Class C quality with heated underbelly, double pane windows.

rockhillmanor, Most who use motorhomes for cool/cold weather camping should use an insulated custom made curtain between the living quarters and driver area. Even a simple wool blanket (doubled, and done at home on a standard sewing machine), cut to fit, will offer a pretty good insulated wall!

For those who are “creatively challenged”, or do not have access to a sewing machine... I’m sure that the job could be “out-sourced”!