You asked, so here’s my long winded response. With an RV, it’s not necessarily the miles, it’s the years. You mentioned that it’s low miles, which means it has sat a lot. There are two “mechanicals” to worry about: the chassis (engine, suspension, frame) and the house (structure, roof, appliances). Sitting may or may not affect the chassis, although you’ll need 7 (including a spare) new tires immediately. They ain’t cheap. You’ll want to have a mechanic attend to all the usuals, oil, trans fluid, coolant, AC, power steering, belts, etc.
The house portion needs a keen eye to check it out. #1, does the roof leak? A hose will go a long way towards checking that out. Rigs that old (not covered and kept in the sun) will inevitably leak, at least at the points where old caulking is used to seal vents, etc. Those are easy to fix, tears or holes in the material not as easy. Are there any signs of leakage on the interior walls? Stains, bubbling and bulging particularly at the ceiling joints are telltale signs. Check around the windows. Now the appliances: I’ll assume it has a 3-way fridge. How long does it take to come down to temp on propane? Does it work on 110 and 12v, although I think propane works better on those absorption units. Do the burners and oven (if equipped) work? Check out the electrical systems, both 12v and 110. Will it need a new battery (either a single 12v or better yet, 2-6v deep cycle batteries)? And onto the water system. Does it run freely without leaks, regardless of whether you’re using the 12v pump or connected to the city source. How about the water heater? Does the shower work? And of course, the real reason we buy these things: the toilet. How does it look? Leak? And you’ll want to make sure the black and gray tanks are in good shape.
Have I scared you off yet? ??? You mention that you won’t be working on it yourself. If that’s the case, then here is my recommendation: find yourself a mobile RV repair service that is willing to survey the rig, they’re out there. They may not actually recommend the rig one way or another but can give you a pretty good idea of the condition of the rig. Then you’ll have the data you need to make an informed decision. We bought an ‘04 Fleetwood Fiesta in ‘08 with 80k miles on it. I was less concerned with the mileage and more concerned about whether it had been sitting. Other than a blowout (lesson learned) there have been no chassis issues. There have been house issues which I have had to deal with, cussing involved, but they were to be expected. We’ve had a ton of fun with it, dragging motorcycles out to the desert and just hanging at the beach. Good luck.