For that type of money, I would probably have to buy the skid steer and the implement and go to work....then resale all the equipment.a good operator with a mulching head would be best.
be sure he back mulches and grinds stumps about 1-2in below the surface. They will NOT resprout if ground like that. If the mulch is extremely thick, you can just rake it up in a pile, let it dry, and burn.
Figure around $16,000 to $20,000 to reclaim 10 acres of that stuff. Not cheap if done right.