You are assuming two otherwise identical homes selling for a difference of X dollars and that is not something one is going to find. I spent $22,000 to change my driveway and add a pad and gate and fencing which made it easier to park an RV or boat trailer. No way do I think that I increased the future selling price for the house by $22,000.
If I lived in a retirement community or area with active fishing and boat owners it might be different. I might pay a little bit more for a corner lot that did provide access for an RV or boat to be stored behind the house.
I bought my present home 20 years ago and at that time another home in the price range was available. The other house had a second lower terrace area that had about 1 flat acre and a 3 car garage and the flat area was paved. I could have put 4 class A motorhomes on the flat area and 3 boats inside the garage. I did not buy the house as the house itself has a 1950's floor plan with a tiny "family room", tiny fireplace, separate small living room, and a small master bedroom. The house I bought instead has an open floor plan with 3x the window area with a view of century oaks from all four sides of the house.
There are benefits for us in having our RV at the house when loading or unloading it but the rest of the time it is taking up space that could be put to other purposes.
There is also a negative aspect as having an RV parked at a house does subtract from its "curb appeal", ask any real estate salesperson.
