Thanks to all for the input and advice.
For better or worse this is what I ended up with. Electrician installed a transfer switch so I can hook it to my house when necessary (which isn’t often) and it’s clean enough power to use for a residential backup. AVR allegedly helps with that.
No plans to ever try to run 24/7, just off and on to keep water flowing intermittently, refrigeration units cold, and bump heat once in a while. Portable so I can keep the freezers and heat bumped every few hours on the unoccupied house. Long power outages are relatively rare here. Pretty decent amount of power in remote parts of the property as well. After these photos, put casters on bottom of the sled frame so the PTO shaft is level when it’s sitting on the ground.
Guys at IMD in South Carolina were great to work with. 3 point was a bit cheaper than trailer and takes up less room in storage.
Electrician said he’d never heard of running a generator off a tractor (I don’t think he’d ever seen a PTO before) and couldn’t imagine it holding consistent voltage and frequency like a dedicated generator so I told him to feel free to play with it, put loads on, take them off, start the well pump and A/C or whatever he wanted. He took me up on it and messed with it for a bit while monitoring the output. Finally said much to his surprise it works like the standbys he usually installs.
Glad to have some serious and highly portable power and also not have to do the prep work to move to the camper every time there’s a threat of power outages.