Unless it very recent, tractors are simple and generally easy to repair compared to any vehicles less than 20’years old.
You should have shop and parts manuals and be aware some of the parts are a lot heavier but at least for me, I’m almost never satisfied with someone else’s work when I give it a close inspection. Doing it myself leave me only one person to blame if I don’t like the workmanship.
By the time I loaded it up, took it somewhere, brought it home, I might as well just do it myself anyway.