It could be possible to take a 4ft brush hog and remove the gearbox and replace it with a hydraulic motor. Depending on what the gpm requirements would be for a motor that's powerful enough. I have seen some hydraulic powered rotary cutters (for skid steers, for example - no PTO) but I also know that skid steers are designed with large capacity hydraulic systems, so I don't know if a small tractor with remote hydraulics would have enough power to run a 4 ft cutter blade. If 4 or 5 gpm were enough, then it might be a good solution - as long as you can find a brush hog with a blown gearbox, the cost shouldn't be too bad on that side. Cost of a hydraulic motor? IDK.
Scott in Brighton NY
Scott in Brighton NY