Having owned an Ace years ago I can tell you they are not good cold weather RV's. Coming back from a trip to FL to our home in MD at the time, we encountered freezing temps. In a few hours the water pump and lines started to freeze. We also found the front Cap was insulated poorly and developed a lot of condensation and the cockpit really drafty. My feet would freeze while driving. Your best bet in freezing temps is to winterize the rig, run antifreeze through the lines, drain the water heater, etc. An ounce of prevention. You'll also burn through a lot of LP running the furnace in cold temps. You can certainly do what you are talking about but just prepare the rig for any freezing temperatures.