Joking aside @joop, your best bang for the buck will come from getting a place with decent insulation and airsealing. If I were buying a house, I would want their utility bills from the previous year before I signed. My place cost me $5k to heat (with oil) the year after I bought it, no fun. It now costs me about $1500 to heat with electricity.
With your cheap hydro power (if you confirm its 7 cents/kWh on your bill) and iffy solar resource, its unlikely that solar would have good payback.
If you are worried about reliability in a back-woods situation, solar is not cost effective for that either, I would look at a woodstove for backup heat and a small genny or EV or PHEV hookup for electricity backup (which is what I went with).
With your cheap hydro power (if you confirm its 7 cents/kWh on your bill) and iffy solar resource, its unlikely that solar would have good payback.
If you are worried about reliability in a back-woods situation, solar is not cost effective for that either, I would look at a woodstove for backup heat and a small genny or EV or PHEV hookup for electricity backup (which is what I went with).