Me again. Putting aside towing ability and all that. If you plan on using your camper during cold weather, you'll need heat! Now, consider the inside space that has to be heated. The more slides out, the more space. The higher the ceiling, the more space. If heating exclusively off your camper furnace in 20 degree or colder weather, you're going to go through a lot of propane. A lot of us carry ceramic, or space heaters, or oil filled heaters as supplements. I do know in 20 degree weather, my Outback furnace runs pretty much steady. That's burning a lot of propane in a short while... Like I said, it's just something to think about!