Here's a statement that gets me a certain look in industry meetups: I think most mid-sized contractors should own at least one core Potain tower crane rather than renting their entire fleet.
I know, I know. The conventional wisdom is that renting preserves capital, keeps you flexible, and avoids the headache of maintenance. Conventional wisdom is also what kept me renting for six years. And I can show you exactly why that cost us more than buying would have.
Procurement manager at a 120-person structural concrete company. I've managed our equipment budget ($1.2M annually) for eight years, negotiated with 15+ vendors, and documented every rental order and repair invoice in our cost tracking system. (Yes, I actually built a spreadsheet for this. It's got 5,000+ rows. Don't judge.)
The Moment the Math Changed for Me
In Q3 2022, we were building support structures for a Mid-Atlantic high-rise. The project required a self-erecting crane for 10 months minimum—a Potain Igo T 99 A, to be specific. We'd rented similar units before, so I didn't think twice about calling our usual supplier. They quoted $4,800 per month for a 12-month commitment. Standard.
The quote came to $57,600 for the year. I was about to approve it when a foreman—been in the game since the 90s—said, 'How many times have we paid that for a crane we kept running for back-to-back projects?'
He was right. We'd had that same model rented for 18 months on the previous job. And the job before that? Another 14 months. We were effectively paying perpetually for a piece of equipment that was always on site.
I ran the numbers. At the time, a used Igo T 99 A from a reputable dealer ran about $85,000–$95,000. (Pricing as of October 2022, based on listed inventories from two national dealers.) Compare that to $57,600 for one year of rent. If we kept that crane for 18 months—which we had, historically—we'd pay $86,400 in rent. Nearly the purchase price. And after 24 months? $115,200. That's more than the crane's purchase price, and we have nothing to show for it but a stack of paid invoices.
Three Layers of Hidden Cost in Rental
That example alone might not convince you. Renting has obvious advantages: no upfront capital, no maintenance liability, no resale risk. To be fair, I used to believe those advantages made renting the clear winner. But the deeper I dug into our actual spending, the more I realized how much of our rental budget was going to things the monthly rate never shows.
Layer 1: The 'Mobilization and Demobilization' Trap
What most people don't realize is that the listed rental rate is only the beginning. When we audited our 2023 spending, I found that mobilization and demobilization fees—crane delivery, setup, site prep, removal—added an average of 18% to our total rental cost per project. For one short-term job (3 months), the mobil/demobil fees were actually 40% of the rental base rate.
Here's something vendors won't tell you: those fees are often non-negotiable for short-term rentals, but they get discounted (or waived) for long-term commitments. The vendors know the setup cost is the same whether you rent for 2 months or 12. So the short-term renter pays full freight.
Layer 2: The 'Maintenance Included' Fine Print
Rental contracts often say 'maintenance included.' I used to think that was a clear advantage over ownership. Then I actually tracked every maintenance call we made over a 36-month period across six rental cranes.
The reality: included maintenance means the vendor decides when and how to service the crane. We had two instances where a rental crane was down for 3–5 days waiting for the vendor's technician because our regular (cheaper) mechanic wasn't 'authorized.' Those delays cost us in extended crew time and schedule compression—costs that never show up on the rental invoice but definitely showed up in our project P&L.
When we calculated the hidden impact of those delays across our 2023 jobs, it added roughly $6,000 per crane to the effective cost. (Based on internal labor tracking and schedule delay analysis.) That's the kind of cost you never see in a rental comparison chart.
Layer 3: The Opportunity Cost of Paying Forever
This is the one that keeps me up at night. In 2021, we approved a $4,500/month rental for a Potain MD 509-25T. We kept it for 22 months. Total rent paid: $99,000. ($4,500 x 22 months.)
At that time, a similar used MD 509-25T was available for $145,000. We didn't buy it because 'we didn't have the capital' and 'renting protects us from depreciation.'
But what we actually did was pay $99,000 over 22 months—68% of the purchase price—and walk away with nothing. No asset. No equity. No resale value. That $99,000 went to someone else's balance sheet. If we'd bought, we'd have owned a crane worth roughly $110,000–$120,000 on the used market after two years. (Based on typical depreciation curves for major-brand tower cranes with documented service history.)
That's not a 'depreciation loss.' That's a net gain of $10,000–$25,000 in equity compared to renting. Plus we'd still have the crane for the next project.
When Renting Actually Makes Sense (And When It Doesn't)
I get why people go with the cheapest option—budgets are real. And I'm not saying buying is always the answer. If your projects are genuinely short-term and one-off, renting is obviously the right call. The comparison above assumes you have a reasonable pipeline of work for that crane.
But the 'renting is always more flexible' argument has a hidden assumption: that your business doesn't have repeat needs. For mid-sized contractors who work on similar types of projects year after year, that assumption is often false. You know you'll need a self-erecting crane for that kind of job. You've done it three times in the last five years. You'll probably do it again.
My rule of thumb now: If a project's expected rental period exceeds 18 months, or if we've rented the same model for two consecutive projects, we seriously consider buying. And we use a simple TCO calculator I built years ago (after getting burned twice on hidden fees) to model out three scenarios: rent-only, buy-now, and buy-after-one-rental-cycle.
One of my bigger regrets? Not building that calculator sooner. The goodwill I'm working with from ownership for 'saving money' took three years of data to prove. They didn't believe me until I showed them the spreadsheet.
The Bottom Line
Renting isn't always cheaper. It's cash-flow-friendlier in the short term. But for a piece of equipment like a Potain tower crane that has a long service life and high resale value, the math often flips in favor of ownership after 12–18 months. The trick is actually doing the math—with all the hidden costs—instead of assuming the monthly rate tells the whole story.
That said, I'm not a 'buy everything' absolutist. Specialized or low-utilization equipment? Rent it every time. But for your core cranes—the ones you use on every project—the rental trap is real. And it's expensive.
