Heating a house....

I put in my own in floor radiant heat - 3 floors, heat source is 2 50 gal natural gas hot water heaters. Very happy with it. Does need power to circulate so a small generator would keep us going in a power outage. For ultimate self reliance and cost reduction, an outdoor wood fired boiler like what was mentioned would do it.

If you do in floor radiant I have a contact for the best design consultant out there.