A rental business has a short list of numbers that decide the year: what share of the fleet is on rent, what it rents for against what it should, how fast a unit turns around between contracts, and how much of the damage done to it comes back as revenue. Every one of those numbers is produced by paperwork rather than by the machine.
The equipment is rarely the problem. It is bought well, maintained by people who know it, and delivered by drivers who have done the route for years. What leaks is the record around it: the three days between a unit coming back and someone closing the contract, the damage nobody photographed at delivery, the rate somebody discounted at the counter, and the utilization report that describes last month instead of this morning.