I've hunted & fished all my life . M D , there's been several times I've been concerned about something like that ending it for me .

In many of the areas I've lived you can buy firewood a lot cheaper than you can heat with anything else if you can't cut your own . I have a friend that built a modern log house & tried numerous ways to be self sufficient . He installed solar panels , had his house facing south with a lot of large windows in the front for solar gain , installed a composting toilet & had a greenhouse across the front of his house that was Incorporated into the house design . He also ordered a masonry fireplace that has a really small fire box & also has an oven built into the side of it . I guess these type of fireplaces are fairly common in some foreign countries . The fireplace has a fairly large base & runs from the floor right on up through the center of the house & out the roof . It also has baffles built into it so the smoke & heat has to take a wavy path to get up & out of it .
The fireplace came with numbered masonry blocks that you assembled by the numbers . As I mentioned before it has a small fire box in which you build a small , hot fire , about twice a day . The masonry absorbs the heat , then radiates heat for hours . Since the firebox is small & the fires you build are hot , it doesn't use much wood & there is no creosote problems .
The composting toilet had a large tank in the basement that caught the waste & tumbled the waste ever so often to get thorough composting results . It had a hand crank that you used to turn the tumbler once a day or so . It also had a vent pipe that went up & out of the wall to remove any smell . The vent pipe had a small electric fan mounted inside it for positive venting .
He had problems with the system however & ended up replacing it with a conventional septic system . The problem had something to do with liquid waste overflowing or something like that . Don't know exactly what the problem was but it was probably something that he had done wrong while installing it or something he was doing wrong maintaining the system .
His power useage was really low as he used very expensive but extremely efficient appliances such as the fridge , dishwasher , ect . The solar panels didn't really generate much electricty although he had several installed . At times he had to run his generator to charge his batteries . He also had propane gas for the range & water heater which was a tankless water heater .
The waste water from the bathtub / shower & sinks drained through pipes buried in the greenhouse floor & helped heat the floor & the watewater also went through a filter & could then be used for greenhouse plants .
The roof on the house was about a 1 foot thick piece of solid fiberglass insulation sandwiched between sheets of plywood & covered with aluminum shingles recycled from beer & soda cans .
I found a lot of what he did very interesting but I have my doubts as to wheather it was cost effective . Could probably have paid an electric bill for less , especially when you consider the useful life & initial cost of the systems he used . Best Paul