" Although I deliver and set them up for the renters at campsites that they book. "
I kept waiting for someone to say what "GoRVNow" said, which is they can rent it, but they can't drive it. The rental company (person) will drive it and set it up at the campground of their choice, they stay in it, then the rental company comes and does tear down and drive away. If they want to go to more than one campground, there is a set of fees each time it's moved. This would be much more analagous to an AirBnB type setup.
I see a 'rookie' driver doing terrible things to a 40' DP when they drive a Chevy Cruze to work everyday and haven't ever driven anything like a Class A. Just staying in it only, well then it's just a case of how messy are they and do they leave things alone (i.e., no gerfinger plinkin of every button they see.) Put a locked door over control panels, slide buttons, etc. With a damage deposit, rental fee, a setup/teardown fee, and a cleaning fee, this really wouldn't be something that a lot of people can afford. You would likely get a better clientele. Of course the flip side is they are a person who figures they spent ALL that money, they'll get their money's worth and do some damage. Happens every year in the spring break hotels, bike week, anyplace there's drinking and fun.
Bottom line: I think it's dicey to do it, but if you don't have materialistic attachment to the RV, then it wouldn't matter.