Unless you are dead set on the Generator look/setup, it may not be a bad idea to use a heavy alternator w/ battery and inverter. Since you are not likely to be continuously running full power on anything you are going to hook up to the alternator in either an emergency situation or "normal/play/work"use. This allows you to run the motor at a constant power level, charging the battery and you let the battery be the buffer soaking up the peak loads when a motor kicks on. Depending on how electrically savvy you are, you could work out a circuit to kick the throttle between full, and low/idle based on the battery voltage. Electronics need clean 60Hz "pure sine" power (computers, tv's, gadget type stuff. Depending on exactly what you are looking at running this could include other "usually" not picky items) Electric motors are less fussy, if you have a "cheap" fridge/freezer, just need to run a blower for an older gas furnace, or wood furnace/boiler you can use a less expensive inverter for these type of loads.
Of course, you need to do the homework on what you want to run.
$$$ will dictate not only how clean your power is, but also your power effeciency, this goes for an inverter or a generator head. Do your research, and build what works for you/what you want. Either way, have fun!
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