They are not really heavy enough for much plowing or stump pulling. A tractor is better for that stuff. I would try to find an old 8N ford that's in good shape. Those bad boys will work plus they have a PTO for operating movers and stump grinders, you can even get a back hoe attachment for it.

I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago. Edgar Allan Poe