want to put my rv into rental agency, which one is best?

If you really want to keep it, you might consider parking it in a nice RV park and list it on Airbnb. We stayed in a very nice fifth wheel in Moab a few weeks ago. It was less expensive than most hotels, and had the benefit of a kitchenette, dinette, and a toilette :). The unit was spotless when we arrived, and in very good shape.
I don't understand how the owner made money unless he bought several at one time and had a deal with the camp ground, but that's his business.