As for the perceived high cost of professional repair. Keep in mind that Class A RV's consume a LOT of 'floor space' and mechanics that are qualified to work on them are truck mechanics. As someone pointed out, the average person really shouldn't even be pulling wheels off these big boys. I've been a mechanic all my life but yield to the pros to do the heavy chassis work on my Fleetwood. That said, you can still do a lot (fluid changes, minor mechanical repairs) and save a lot of money. The big 'rolling hardware' work isn't the domain of the DIY person, though. Our previous Class C was MUCH easier to work on and I did more on it. My experience is the chassis repair can be handled by truck stop repair shops. You get stuck at the 'end of the line' (guys making a living driving come first AND you have a rolling house to wait your turn in) but those places have the best mechanics and don't charge anymore than the not-so-pros at the RV dealer.