As many here have said, I too think it's not a good idea to rent it out and the motorhome is 20 yrs. old. I would imagine that it needs something (repairs/maintenance) fairly regularly. No one will ever take care of a unit better than you would. I've seen rental cars that were brand new that were abused.
We rented RV's three times before we decided to buy. The company that we rented from in Southern California traded-in their rental fleet every year for a whole new batch (30+ RV's).
The owner told me that it was better to get new ones every year rather than trying to fix 'age' related items. I'm sure he had a good agreement with Fleetwood as that's what he rented (class C's and class A's gas and diesel).
I would sell it or store it until you are ready to get back on the road.
Safe travels,
MM.