In response to the OP's question . . .
Yes, RV's require repair and maintenance. It is no different than owning a home, so you need to understand that going in. Shoot, our home is a bottomless pit of expense and never ending upkeep, but our camper is MUCH less.
The difference in my mind, is the fact we are exploring the U.S. in our camper, so I don't mind keeping it in top working order. In contrast, our house just sits in the same boring place, with the same boring view, day in and day out . . . yet is still falling apart!