Hardwood firewood is about $50-70 per face cord here. I use a wood fireplace and propane furnace for normal heating. In addition, there is a propane fireplace in the basement in case the power goes out and we are not home. I heat a 450 sq ft shop and 1600 sg ft house.
A pellet or wood heater is not a good choice if you are absent for even two days. You need to keep the water lines from freezing.