Price is ok, not great. Look at parts for that thing. 32 years old, it gonna leak, or leak soon. In that sized tractor, I prefer gasoline. Look around for $500-700 bucks you can buy a whole new engine.
I just scooped up a case 444. hydrostatic with a 14hp kholer. Can put a new motor and pto pump in there for under $1000 if I need too.
Tires cost money too.
Far as food plotting goes, not much different than an ATV, possibly better. You get the speed down for implements. That may have rear hitch you can weld up a basic set of S tine harrows. Sometimes called danish harrows. Does it have a bucket? You can always use it a year and probably sell it for the same or profit. Assuming its in good shape and has some implements. Alone in good shape, its a fair deal. $2500 would be better.
A few more bucks you have have alot bigger john deere tractor in 2wd. You can always find an ok 6ft finish mower for $500 or so.
Small oddball stuff you need to rebuild gets quick fast. I rebuilt the diff on a suzuki 230 atv. for the same price I could of rebuilt the diff and motor if it was a morre popular honda.