A generator is east to build, take an inverter (DC to AC), a 12VCD alternator, Metal shaft, and a turbo (vertical drum style that way it is unidirectional) fan (you can weld a few 3lb coffee cans together and cut vents in them if all else fails), about 30ft of electrical house hold wiring (use 12 gage), and a 12VDC battery. Throw it all together and you got a 120 VAC power source.