My BX 25 won't power as much as I need so I have a 17.5 KW Generac (gas engine) wish it was a diesel but portables like that do not come in diesel. My brother-in-law has a big farm and a 100HP tractor and he hooks up a 30KW PTO Gen Set, runs his whole house and out buildings. He uses it a lot as someome is always taking out power poles along the busy road he is on. It takes him almost a half hour to get every thing moved, hooked up, and properly balanced with voltage and frequency. Mine is hooked up all the time in winter and I have it going and switched over in 5 min. When I was researching I found the 17.5 is the largest portable made and only Generac makes them. There may be others but I did not find it. All the other brands now top out at 12KW. Looking at the big picture I would rather run a gas engine the 100 hours I have this last year than put 100 hours on my tractor, if I had one big enough. The 17.5 only cost me $1800.
Ron