'An electric induction cooker is superior to any kind of fire, in all aspects and ways, by large margins in every direction.' - except in running costs, I have no idea but assume they draw around 2000 watts for each plate.

  Alternatively, I can collect enough firewood in a few days of my spare time, I would have spent in the woods anyway, that will heat my modestly sized house cozily and cook all my meals for at least 6 months of the years in temperatures that can drop to as low as -40 Celsius for days at a time.  All it cost me was a bit of sweat and hard yakka in the autumn.