At the Hershey RV show the Workampers presentation included a concept of Rental.
The 1st thing I thought of is my insurance does not allow me to rent, nor does my "mortgage".
Also in order to rent as a living accommodation you need a U&O permit, which I seriously doubt is obtainable on an RV, without zoning or other types of legal stuff.
Now most of the time you wouldn't have to worry, but if something were to happen I'm sure all the extra money you made would be long gone along with your RV and any other assets.
If you need extra money sell the RV :)