Things to ponder:
The kool factor of building a accessory to go on your tractor is very rewarding.
sometimes it is practical sometimes not.
Being older now, I tend to not fuss as much as I once did.
It takes a bit to install/remove the power generator on the front of a tractor
after you have it finished,
much like a snow thrower/blower.
I wonder if a 2 to 1 ratio is practical?? sounds like a lot to expect of an engine unless the generator head is designed to run @ 1800.
Today I see a lot of generator sets sell quite inexpensively @ auctions C/ list
& local papers. $150-$250
I would think it less expensive/easier to obtain a stand alone unit that can be pulled or set in a cart behind the tractor.
or even on a rear mounted " carryall"
That would free up the tractor to go-fer things/tools etc.
Just some thoughts, not to rain on your parade.