dont see your location but COAL is a great economical heat, +wood is even cheeper but more work unless you buy it. you could run a cheep hand fired unit or a small stoker stove with a thermostat that stays on. i live in pa=coal reigon + turn off my oil when its gets + stays under the 30's, about 2 ton for a heating season, a little less than $200 + haul it in myself + dump the ashes @ our local road cleaning ash pile. i am using a hand fired harman + nut coal but many other models can auto feed so it needs less care, but i am retired + mostly home or garage in the winter, garage 32-28 + well insulated uses a small wood stove THAT puts me in a TEE shirt in temps below 30 in short order!! check out coalpail.com + other sites for cheep heating!!