My mountain home is 2 floors, 2360 sqft total, 3 bedrooms up, 2 complete kitchens, 2 1/2 baths, walk-in cold room, library, workshop, I've got it all. My Harman PP38+ wood pellet stove heats it all. Over the first 5 winters, that stove saved me the capital cost of the stove & pipes ($3k)and the capital cost ($2k) of a back-up solar power system.
Oil prices in those days were on a constant climb. So, I made my nut and now, I buy wood pellets for maybe $240/ton, 5 T/winter and long term, spend nothing.