What I would look at. If it's been sitting in a campground all it's life, it's going to need tires, and the brakes and light all checked out. Look for roof leaks, mostly around seams and roof vents and air conditioners. Check the closet draws for open and closing knobs/handles locks. Check refrigerator make sure it get cold(freezer should be chilly after being on for 10 mins or so). they can be expensive to replace. Check the furnace make sure it lights and stays lit. Hot water tank,same as furnace, water pump, holding tanks, sewer dump valves. Make sure you like the lay out inside. there are many different styles so find one you like. It's a buyers market, so you have the freedom to choose.