A year or two on the road and you will quickly see that most of the stuff is common sense and you can fix yourself. AND it's always the same stuff that breaks on RV's. So if you can't figure it out I'm sure the guy parked next to you at a CG will have already repaired that part.
No matter if it's Class A or a TT. The innards are all the same on all the RV's. Any camping store will have the part you need too. Just take a walk thru a small camping store.....you will see they stock all the common parts that are doomed to fail on your RV right on the shelves.:B