Homeowner's insurance may pay (which may be the insurance that the OP is talking to).
One really needs a good diagnosis of what caused the fire. Wiring? Oil? Debris? Overall the photos of the tractor look fairly clean.
Design flaw with wire or rubber too close to the exhaust manifold?
Ultimately, if it was my tractor, I'd get it home, and go all Mad Max on it. Get a copy of the wiring diagram and dealer manual. Then rip out everything burnt (that is not serviceable, smoky may be OK) and figure out what to put in it's place.
Too bad you're on the opposite side of the country.
It looks like the fire was fairly superficial.
A new main wiring harness might be nice. There is some damaged plastic around the dash, but I might even just trim that up and leave it, or make a patch.
Ultimately the tractor doesn't need to look perfect, it just needs to not burn down the whole neighborhood. (At least in my opinion. Nothing around here looks perfect.)
There are a number of tractor wrecking yards around the USA. Around here, Farmland Tractor near Albany, Oregon. Wild place with chunks of tractors everywhere!!! Your Kubota may be a bit new, but it would be worth calling around, and browsing E-Bay for any expensive parts you may need.
Farmland Tractor brings you a huge selection of new aftermarket, used, and remanufactured farm tractor parts for sale. This is a one stop shop for all your aftermarket tractor parts. Shop now!
www.farmlandtractor.com
Just 2 days ago I had a fire on my old John Deere. A lot less damage than yours. The insulation on the starter switch broke down and caught fire. Disconnected it, and a bit of blowing, and ultimately only a $20 part which I had already bought and had in stock. Even the starter seems OK. I attributed it to the person I bought it from having put a 12V battery in place of the original 6V battery. So, it will get a new 6V battery before getting moved again.