About the same as electric, but a bit more hassle if it can't be delivered by truck. The most economic option is an outdoor woodstove, about $10K to install a big one and after that you need to keep it fed, a heat pump is another viable alternative. Another option is fuel oil (essentially: diesel), in an oil burning furnace.
The best way to cut your heating bill in Northern Canada is insulation, wooden houses are pretty good at this to begin with, you can get pretty close to neutrality by some solid engineering (South facing windows, take advantage of thermal mass), then you only need to add additional heat besides what you already generate when cooking on long stretches of overcast days, which don't happen all that often there.
The best way to cut your heating bill in Northern Canada is insulation, wooden houses are pretty good at this to begin with, you can get pretty close to neutrality by some solid engineering (South facing windows, take advantage of thermal mass), then you only need to add additional heat besides what you already generate when cooking on long stretches of overcast days, which don't happen all that often there.