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Most homes have a 200 amp main in the box. Lets say you think you can make it on under 100 amps. My 5kw generator puts out 30 amps under full load, so that equals 15kw to run a normal house. Of course there are times you don't run a tenth of that, but you never know. Now consider what you would have to have to run even 10kw to get a few window units and a couple of bulbs and other toys. You need a pond the size of a football field to get the head pressure needed to turn a 10kw under load. You need a yard full of solar panels to get even 3kw with batteries. Then think about maintenance.

IMO, the way yo go would be to start to build a water converter to H2 and save it in a tank during quiet times and use it when you need it. There is a web site dedicated to off the grid somewhere in New Jersey where a guy did it. It was about $250k investment, but he even ran his boat and cars on H2. The most obvious problem was the acre or so of solar panels on his house and yard.( God forbid a hail storm) How long would it take to pay $250k @ 271 a month. If you can get nat gas to your home, that's the answer. Nat gas will be cheap for the near future. Coal would even be cheaper but that means a fire in the house again.