I love my ZD mowers but I agree.$6000 increase in 3 years for my zd1211. Kubota is pricing me right out of the diesel mower market.
I sold my ZD1211 great machine btw but lacked power on my steep hills.
I bought Two ZD1511-72 & absolutely love them but I need more power & an 84 inch single deck for my Hilly 18acre application.
My farm ground is too rough for FD models tiny deck wheels running on the ground.
I mowed 20yrs with a 4700/4720 JD tractor with - 6ft then 7ft then a 9ft single deck rear finishing mowers.…
My tractor runs relatively smooth on rough ground when using a flail mower.
Have you considered a wide flail mower with Y-flails as an option?