The pace arrow will all ready have 110v outlets in the plumbing bay and perhaps a few others.
She will also have 12 volt lighting in all the bays, switchable from inside.
Since you're ay home and not living in the coach, I wouldn't bother with electric heaters. They will not help keep your plumbing from freezimg.
Keep the propane furnaces running, set the thermostats to 40-45, and the coach should be mostly fine.
The waterline for the fridge icemaker will freeze in a heartbeat, and that cheap vinyl tubingg will burst. Disconnect a wire from the solenoid, and both water lines, in and out. DON"T FORGET to hook them back up before turning the water pump back on!!!
Opening the low point drains will protect most of the plumbing. Open all the faucets too.
The washer/dryer will also freeze. Cycle it briefly whith the low point drains open, and keep your fingers crossed.
If you have no propane to run the hot water heater, drain it.
If it's gonna get really cold, dump a lil antifreeze down the drains, it doesn't take much.
I rigged a winterizing hose on my 99 PA this year, I just unscrew the filter screen from the water pump and screw the hose on, dunk it in a gallon of antifreeze, and turn on the pump, and start running faucets until they run red. Took 4 gallons this year (with the water heater bypassed) and I made sure it flowed thru the washer/dryer and the icemaker, as well as all the faucets.