It is common business practice to charge a premium for a premium product. As a rental/resller agency, the expectation is that you’re already offering upgrades and increases. Adding Nature Calls to your fleet is no different….but the rate sure is..
As a quick example, Avis marks up their premium rentals more than 100% per day on their premium products. Sure the vehicle costs more to add to their fleet (and the majority of their fleet doesn’t consist of these types of vehicles)…but for that customer who travels in style and is willing to pay for an upgrade, it is a great option to have.
Doubling your rental rate by delivering a premium product…that’s good business.