The main one I've heard is that RVs follow the car principle and depreciate in value the second you drive them off the lot. In contrast, a home generally goes up in value, and significantly too, depending on the market. An old home can still fetch an attractive resale value, which might not be true for RVs. Water damage can affect most RVs over time, so try to look out for signs of it before it becomes a problem. You also can apply a sealant every year to the roof as a preventative measure.