I never went to school. Only graduated high school because my mother taught there (cracking the whip).
I was fortunate to run a business for years with a fleet of horrible vehicles that broke down every few days :-)
Thus the saying with ford trucks: "You can fix darn near anything if you replace darn near everything."

back to tractors:
Don't know if you can find one, but I ran a landscaping company for many years, the handiest tractor was the Kubota B21. It is small, light, could do big work and not destroy the grass in bazillion dollar yards.
por ejemplo:
http://www.youtube.com/watch?v=aU6JAPwRvxg
Tho I worked with a fella that was 325lbs and he looked mighty funny on the tractor.

anyway,
Drew