I know that potential motion does not work, but would this work out. If someone took a 300 to 1000 gallon and made a stand 25 feet high and took a piece of 2" to 3" pvc pipe and ran it staight down to a low pressure, high flow water turbine to turn a 6 to 7 kw gennie to run two or three electric fire pumps on the outlet of the turbine and pumped back to the top of the tank. I think a person would have enough wattage leftover to run your home.