sire
jes so ya know, yer not alone with this same situation.
MY house does not lose but maybe 5 degrees overnight in winter with NO HEAT on. Its extremely well insulated and the windows are as well. All around them between the bricks and drywall.
I am NOT in favor of a generator either for the once in bi-annual situation at most..
I can git me a propane heater for indoors to keep warm iffen I need to.. Or I can jes leave the home and go over to my daughters house on a different electric grid.
Its reasonably cold here and it is still snowing.
My house with the front entry door system facing directly west has NO air seepage at all as witnessed by a candle in front of it on the floor and NOT flickering.. At some point maybe tomorrow I will figger out how to get to the vehicles and git da snow offa dem.. I have doctor appointments next week..