There's a new equipment sales/rental place on US77 south of Slaughterville, on the east side, about halfway between the end of the new 4-lane and the new bridge over whatever creek that is. (Chouteau Creek, maybe?) They have tractors and brushhogs, as well as bigger ZTR mowers that might get the job done, but I have no idea what they charge for rental fees. If you'd like, I'll see if I can get their phone number next time I'm down that way.