We've honestly been pretty lucky with repairs on our rig, but I have found that most repairs fit into one of four categories for our travel trailer (I admit it would look very different for MH owners!):
1) The vast majority of repairs are things a reasonably adept person can replace/repair on their own.
2) Some repairs require techs, but can be done on-site by mobile techs who can address things much more readily than a shop.
3) A few repairs actually require a true RV center, but can wait until the off-season (for those of us who have an off-season).
4) A small number of issues need to be done in a shop and NOW (this would mostly center on the chassis and/or other major failures).
In 7+ years with our current rig, we've only run into a #4 once, and we hustled around to get that addressed. Everything else has been workable in other ways, and the vast majority I was able to do myself. Never had a warranty claim, as it was easier to just fix it. If I weren't ready and able to do such things, I wouldn't want to own an RV!