Folks, another idea is to take an old Detroit Diesel 2-71 24kw pulled from a refrigerated boxcar and do a simple top-end rebuild...that's what I did.
Burns less than 1 gal/hr and at a lower RPM...last forever. We had an old fuel furnace that we replaced a few years ago, so we already had a 500 gal. tank in the ground...just get an electrician to wire it up to the house, and good to go.
Me and my fat arse w/ the generator:
Detroit Diesel 2-71 Generator - YouTube