Seriously consider buying an Former Rental. Cruise America and El Monte have websites with lots of information regarding purchasing from their rental fleet. In your situation, that strategy makes a lot of sense. You can get into a RV for a surprising figure!
Also have a RV that has had proper maintenance,one thing that may be missing from a private party.
For more on this option
This Thread may be of interest,there are more than
100 members that have done this and are very happy with their decision.
Both major companies have a
Rent to Buy Option which may save you more money on a purchase of a Former Rental.