Machka I am sorry about all the fire and damage but what you are doing with the cabin is amazing! I wish I could buy some land and live off the gird.
I am in the process of saving money for solar and reuse a lot of my water for toilet or whatever. My husband first scoffed at the idea of not keeping appliances plugged in and reusing bath water for things like the toilet, but when he saw our electricity bill was under $100 and our water bill, with garden, lawn, etc was under $18 per month, he signed right up.