Your tractor's hydraulic pump flow rate at 11.9 gpm gross won't come anywhere near what's needed to operate the mower. If you pick up a pto pump like a prince HC-PTO-1A, that'll put out 21 gpm which should get you into lower skid steer territory. Mower would operate when you switch on the pto. Then you would run separate lines to the back (use quick connects and caps unless you won't use pto for anything but mowing), get a torque arm for the pump, and fab up a platform to hold the reservoir & filter & you'll be on your way. BUT, swapping out the pump/platform/reservoir will be one more job when switching to another PTO implement.