Originally Posted by wildtigger2
I realize that but have no real choice until wife finds work and a rental house opens up. Just need advice how to modify it.
Use plastic and seal the ceiling AC vents and AC inlet to prevent loss of heat. I left the bathroom vent unsealed. I also sealed all the windows with plastic that I picked up from Home Depot. Don't remember the exact name, was several years ago, but it came with tape. Just cut plastic to size and taped up on outside. Held great. As stated below skirt around bottom. I used a roll of the black construction fabric type fence that comes with stakes already attached. Lowes or Home Depot has this, about $50.00 for a hundred foot roll. I off set the gas by using a couple of small electric heaters. This was in New Jersey (cold and 2 to 3 ft of snow most of the winter of 2009) in a 5er that was considered four seasons. We stayed pretty warm, but used a lot of gas and electricity. Now we don't have pets or children to worry about knocking over heaters etc, so this worked well for us.
Almost forgot, use a good heat tape on the water line and then add insulation over that. If the TT un under belly is not covered, you may have freezing issues with the Black tank dump valve. May need to wrap that with heat tape and insulation as well.