For my circumstance I chose spending 5k for a 16kw generac and home auto switch. I thought about getting a PTO Generator but chose the Generac for several reasons over the PTO generator.
1) Didnt want to tie up the tractor from other things like snow removal. Generator was 5k installed and is dedicated-has cold weather package and runs on unlimited natural gas.
2) did not want to leave tractor running overnight
3) Takes time to warm up tractor, connect and fuel up.
4) My tractor and implements cost me around 25 grand not including PTO generator and hookup to house if I got one. Generac was 5.5k hooked up including house autoswitch. Generator has 10 year warranty-when it goes I just buy a new one for 1500 to 2500, hookup is already there.
5) Generator is always waiting and it exercises itself bi - weekly.
6) Diesel is more expensive than NG and I dont have to store gallons on site and dont have to worry about gelling or treating. I dont have to fuel up every 12 hours and I can run my Generac for several days without needed downtime.
7) love my MF too much to leave it outside in bad weather or for thieves to come get.
8) If im on vacation and power goes out whos gonna setup my MF and run it? My hot tub would freeze up, my pipes would burst.
Nice backup plan option for me but for now Im good with just the Generac.