Buddy of mine (HVAC guy) told me that the small compressors in the RV units almost never go bad. Mine has a 30 year old A/C that had stopped working. My buddy recommended replacing the capacitors. I put in new caps. for $40 and it worked great.
If your appliances have a lot of modern electronics, then maybe I would worry about them. If they look more traditional and don't have fancy lights, that could mean they don't have overly sensitive controller boards. It's the controller boards that typically break and those are often obtainable items.
Refrigerator would be my only appliance worry. The tri-power models do eventually corrode their ammonia systems, but even that assembly can be replaced.
What I'm saying is I don't think you need to budget for appliance replacement at 10 years. I think that if they survived that long, you could be looking at another 10 years with maybe some minor repair like capacitors or controller boards.
Jose
