I agree with the idea that if its something you can do yourself, it's easier than taking it to a dealer. If you need a part, see if the manufacturer will send it to you to avoid a trip to a dealer. Then, if necessary, make a list of things that need to be done and try to get it all done in one trip.
After you get the "bugs" worked out, you'll find that everything should be fine, but with an RV, you do have to keep things tightened up and do regular maintenance to avoid future problems. Anyone that wants to own an RV either has to be handy with a few tools or have lots of $$ to spend at the repair shop.