I have followed you for some time, although I rarely comment due to having nothing of significance to add to your sharing. This time I find I do, so here goes.

When I was taking HVAC classes some time back, I became enamored with the idea of heat pumps. Not sure on how much power they consume, nor your choices when it comes to powering them, but long term they are well worth the initial costs when one understands how energy efficient they are.

https://en.wikipedia.org/wiki/Heat_pump

Good luck with your goals. I look forward to reading your progress with them in the coming year.