>>2583589For future cooking and heating, I recently picked up this little cookstove. I haven't installed it yet, and I need to go through it and make sure it won't be a problem. The second option would be to remove the top and use it to build a masonry stove/heater.
Battery/controller/inverter is an EcoFlow EFDELTA. It was pretty pricey, but was an all in one and portable enough. Future plans are a more permanent install with more battery power.