On the low end, any of the ones you can get from a big box with a V-Twin Kawasaki for under $3500 should serve you well.
For slightly more money:
https://www.tractorhouse.com/listin...d-48-zero-turn-lawn-mowers-outdoor-powerStepping up a notch to this one would probably be money well spent at $4500
https://ranchlandtractor.com/Lawn-M...-MS-e1cc7805-01c9-4561-a027-ae9701019758