The charter yacht industry has been doing this for decades. It gives the charter company boats with no capital outlay. For the boat owners they get the boat back after 10 years and then have something with very little value and nothing close to a good investment.
The RV rental outfits I have dealt with replace their vehicles before they are out of warranty and some may do this on a factory lease program if there are tax advantages for them to do this. I cannot see where it is a good idea for a private party to get in the middle. It certainly seems foolish with the huge rate of depreciation of RV's in general.
With anything like this it pays to sit down with your CPA and run the numbers from this company and to read the fine print and see if the projections are reasonable.