If you want a long term solution you could look into geothermal heat. A ground source heat pump is a significant up front investment but you'll not be relying on fossil fuels once it's up and running and the ongoing cost is minimal.
Oil and gas - including propane - are only going to get more expensive and compound the damage to the planet.If you're planning tostay put it might be worth investing.
Also check out this thread
https://permies.com/t/160287/Direct-heat-wind-turbine
Added to the idea above of heating a well insulated tank with solar maybe use a wind brake at the same time. Even if you're just raising the temperature a few degrees by these methods it will all add up.