Heating? Wave 8 catalytic heaters
Water tanks? Electric heaters galore for the holding tanks; likewise hose wraps.
Shower? Until you get the water situation sorted out, a basin for heating water.
Sound? How about a boom box?
Sleeping? Decide where your bed will stay. You'll probably have to have a custom bed frame made. Decide on how large the mattress will be. Once that's decided, buy a German Federbett from Betten-Anne
. They ship to the States. Sizes are in centimeters. I've survived two Montana winters under them. Sure, they're pricey, but well worth it.