According to the RV Industry Association, the median for annual RV usage across all RV owners is 20 days (let's just call it three weeks). The average cost of even a used Class A motorhome (better known as the classic bus-sized RV) is over $90,000 according to lendingtree.com - and that's before factoring in maintenance costs, or figuring out where the RV is going to be stored when it's not being used the other 345 or so days out of the year that it's not being used. That's