Rent or buy? The month the math flips

A Base 20 ft office rents for $795/mo and sells for $17,500, so cumulative rent passes the purchase price in month 23. Whether that month is a reason to buy depends on what happens to the office the month after, and on who pays to move, insure, repair and store it after that.

Which month does rent pass the purchase price?

Divide the purchase price by the monthly rent and round up. That gives the month in which cumulative rent first exceeds what the same office costs to buy, before delivery, protection, fees and tax on either side.

The Grid-Free crosses first because its rent carries the solar array, the battery, the Starlink kit and the camera every month, while its sale price carries them once. The Alpine's mountain envelope, over-roof, deck and backup heat sit the same way, so an office with built-in systems that will live on one site for two winters is the strongest case for buying in the line, and the plain Base office is the weakest.

The right-hand column adds the 12% damage waiver and the 5% environmental fee to the rent side, since most renters take the waiver rather than carrying a security deposit and a certificate of insurance. Both are percentages of rent, so they pull every crossing month earlier by about the same share. Neither column counts the annual increase, delivery legs or sales tax; the sections below add each of those in turn.

What does the simple division leave out?

Delivery. A rental pays a zone fee for each leg, so a Base office in Denver pays Zone E — $1,200 each way to arrive and the same to leave, which is about three months of rent across the two trips. In Avon the two legs are $400 each, a little over one month of rent together. A purchased office is delivered within Zones A–B; other zones are quoted with the sale.

Protection. The renter chooses the damage waiver or the alternative of a refundable security deposit of one month's rent plus a certificate of insurance under Rental Agreement §10. The owner insures the office as property, and after the sale every repair is the owner's, because the office is sold as is under §15.

The increase. Rent rises 5% on each anniversary of delivery under §3. A purchase price is paid once and does not move. Sales tax applies on both sides, once on the purchase and on every rental invoice, so it shifts both lines and rarely changes the month.

The end. A rental ends with 15 days' written pickup notice and a truck. An owned office ends with a decision: keep it, haul it to the next job, store it in a yard you pay for, or sell it. None of those is free, and the last one takes time you do not control.

How does the 5% increase change the picture?

For the first twelve months it does not exist. The first increase lands in month 13, so a rental that runs a year or less is priced entirely at the rate on the reservation.

In year two the Base office rents for 5% more, and cumulative rent at month 24 is 2.5% higher than twenty-four months at the first-year rate. That is less than one month of rent, but two of the rent-alone crossings sit close enough to a month boundary to move: with the increase counted, the Base office crosses in month 22 rather than 23, and the 40 ft office in month 20 rather than 21. The Grid-Free and Alpine crossings hold.

With the waiver and fee on top, the increase moves one crossing. The Grid-Free's with-fees month sits just past a boundary, so the extra 5% on months 13 onward brings it in at month 14 rather than 15. The other three months in the right-hand column already sit far enough inside their crossings that they hold with or without the increase.

In year three the increase compounds. Thirty-six months of Base rent at the first-year rate is $28,620, already past the $17,500 cash price and within one season's rent of the $30,420 36-month lease-to-own total, and two increases push it higher still. A business that knows it needs the office for three years is paying a premium for the option to give it back, and the lease-to-own page exists for exactly that customer.

Month-to-month rates can also change on 30 days' written notice after the minimum term under §3.4. A long rental should assume the published increase and plan a review at each anniversary rather than treating the first invoice as the number for the life of the job.

Where does lease-to-own sit between the two?

Lease-to-own is a purchase paid monthly, not a rental with a prize at the end. Each 20 ft build has its own pair of plans: on a Base office the 24-month plan runs at $1,145/mo and the 36-month plan at $845/mo, and title transfers on the final payment under a separate addendum.

Against the cash price, the 24-month Base total of $27,480 and the 36-month total of $30,420 both cost more than the $17,500 purchase. Against renting, the 36-month payment of $845/mo sits close to the $795/mo Base rent; the difference is that one of them ends in a title and the other ends in a pickup.

The plan does not remove the running costs of a placement. The delivery-zone fee, the protection option and the environmental fee apply during the lease as they do during a rental, and JOLT Upgrades stay rentals with hardware that remains ours whether or not you own the box under them. Lease-to-own starts by phone or email rather than through the online reservation flow, because the addendum is signed before delivery.

When does renting win after the break-even month?

When the office is surplus the day the job closes. A superintendent who finishes a 30-month hospital addition in Glenwood Springs has paid about 1.4 times the purchase price in rent, and has nothing to sell, store, insure or haul. That is the product, not a failure of the math.

When the office moves. Every move of an owned office is a tilt-bed or flatbed both ways at market rates, plus whoever disconnects the shore power and reconnects it to code. A rental moves once for a $450 relocation fee plus the zone legs, with our crew, our truck and our rigging.

When the site changes shape. A rental customer who outgrows a 20 ft office calls the yard and arranges a change: a swap to the 40 ft office with bathroom on a new reservation, with its own delivery legs and a pickup for the smaller unit, or a 20 ft storage container placed next to it. Neither is automatic, and both are priced as the separate placements they are, but an owner who outgrows a purchased office owns the wrong office and there is no phone call that fixes that.

When something breaks. Accidental damage on a rental under the damage waiver is handled under §12, theft excluded. An owner's mini-split compressor failing in February is an owner's problem, and the office was sold as is.

When does buying win before the break-even month?

When the office will outlive the project. A yard office, a guard shack at a gravel pit, a ranch office at the end of a county road or a permanent field office for a utility crew is a purchase from the first month, because the "end" that makes a rental valuable is not coming.

When the office will move from job to job under your own control. A general contractor who wins three eighteen-month projects in a row and owns the office pays for a hauler between them and nothing in between, while a renter pays rent through the gap or gives the office back and reserves again with a new deposit and new delivery legs.

When the rental minimum already covers a large share of the price. The 3-month minimum on a Base office is about one-eighth of its purchase price, and a full year is about half. A customer who is confident about two years and unsure about three is the one person who should run the table above with their own zone and protection choices before deciding.

When capital is not the constraint. Buying front-loads the cost, renting spreads it, and only your accountant can tell you how an owned office and a monthly rent expense are treated on your books. The break-even month is arithmetic, not advice about which one your balance sheet prefers.

What changes when the container is for storage?

There is no published JOLT sale price for a storage container, so the buy side of that comparison is a dealer's quote for a one-trip or used box delivered to your site. Whatever that number is, divide it by the monthly rent to find your crossing month: a 20 ft storage container rents for $295/mo on a 1-month minimum, and a 40 ft high-cube rents for $425/mo on a 3-month minimum.

The storage decision leans toward buying sooner than the office decision does, for two reasons. A storage box has no mini-split, wiring, windows or personnel door to fail, so the as-is risk of ownership is smaller; and a dealer's used-grade box costs a fraction of a new one, which the one-trip versus used answer covers grade by grade.

It leans back toward renting when the box has to move or has to be gone. A rental box leaves the site on a truck we send, with 15 days' notice, under §16. An owned box that is empty behind a finished building in Aurora is a listing, a phone call and a hauler, and it is often still there a year later.

Storage boxes also carry the full rental cost stack. The deposit on a 20 ft storage container is $350, the waiver, the environmental fee and the increase apply the same way, and each delivery leg is the same zone fee as an office. Short, uncertain or seasonal storage rents; storage you will still want in five years is worth pricing to buy.

How do you run the numbers for your own project?

1. Write down the honest number of months, then add two. Closeout slips, and a rental keeps billing month to month until the pickup notice and the truck.
2. Add the zone legs from the delivery zones page to the rent side, both ways, and any relocation you can already see coming.
3. Decide protection. The waiver is 12% of rent and recurring upgrades each month; the alternative is a refundable security deposit of one month's rent plus a certificate of insurance under §10.
4. Add the 5% environmental fee, and apply the 5% increase from month 13.
5. On the buy side, take the sale price, add sales tax for your jurisdiction and delivery beyond Zone B, then add what you would spend to insure, maintain and eventually move or sell the office.
6. Compare the two totals at your month count, then ask the month-25 question in the callout above.

Worked through for Edwards, the extras move the month. A Base office with the waiver, the environmental fee, the increase from month 13 and both $400 Zone A legs on the rent side passes its purchase price in month 18, not month 23, so a 17-month project there still comes out under the price, and the office leaves when the job does. A 20-month project on the same terms is already past it. The same office on a 40-month program is far past every crossing in this answer and should be a purchase or a 36-month lease-to-own from the start.

What should you reserve, or buy?

If the job is under two years or the end date is soft, reserve a Base office with the $750 deposit, take the waiver, and revisit the decision at the first anniversary when the increase arrives. Nothing about renting first prevents buying later; it simply means the crossing-month arithmetic starts on the day you sign the bill of sale.

If the office is going to a permanent yard, a long program in Zone A or B, or a site where it will stay for three winters, price the 20 ft office purchase or the 40 ft office purchase against the table above, and call 970-279-1015 if the site is outside Zones A–B so the delivery can be quoted with the sale.

If the answer is three years and cash flow matters more than the total, the 36-month lease-to-own plan costs $845/mo on a Base office, close to its rent, and ends with a title. The mobile office rental cost guide lays out the full rental invoice line by line, and the pricing page has every figure used here on one sheet.