I WISH more of my neighbors were self sufficient. Lol
There's a new approach to an old idea, called cogeneration. Folks were used to putting in one kind of energy and getting the desired result out, without considering the potential byproducts. Rising costs and concerns for efficiency have encouraged a new look at this old situation.
Cogeneration changes all that; when generating electricity, for instance, there's nearly always going to be heat created as a byproduct. Well, instead of building a huge power plant in the middle of nowhere belching out millions of BTus of heat and just wasting it into the sky, why not have a small one at home? It could generate power to be used by the dwelling and the excess could be sold back to the grid, perhaps even paying for the unit itself. Meanwhile the heat generated could be put to good use heating the house, domestic hot water, garage, doghouse, hot tub, pole barn, chicken coop and whatever else you can think of that might benefit.
These already exist, and are being deployed in certain districts where power companies are required to buy small amounts of customer generated power from such so-called 'distributed generation networks'. The regulations governing this are new and obviously not in force everywhere, but it may be worth looking into.
The units themselves are a combination car engine, heat pump and electric generator, running on natural gas from standard utility service. Running to generate electricity, the car engine makes heat and spins the the heat pump compressor, allowing for AC in summer, while the cogenerated heat is available for the above mentioned uses all the time.
I realize this is perhaps not the specific solution you may be looking for just now, but I find it comforting to know that such equipment is coming on the market. From here, it can only get better, faster and cheaper, lol