I would go with metal frame. They are more stable than the wood. If you don't mind the work. You can make your Rv "4 seasons" with aftermarket installations. I recommend older high-end units. You can find good deals this time of year on auctions, and Craigslist. Either way for the size of Rv you are looking for. You are going to need a 3500. Safer. Remember, it's not the starting that's the problem. It's the stopping. I have seen RVs pushing trucks down even small hills. With white-faced, death gripped hands drivers behind the wheel.
