Zero Turn Mowers

I mow for a living and have had good luck with Kawasaki powered Exmark and Scag. Others may also be okay; but those are all I’ve owned and used. The manufacturers make different grades, from entry level residential to heavy duty commercial; obviously the commercial grade machines are tougher, but also more costly. Whether you buy new or used, look for a popular brand with servicing dealers in your area. We have had one long time dealer close down recently (owner retired and sold the building) and another changed ownership during Covid and is now essentially an unusable dealer; management is clueless and all of the good employees left. So, being a popular brand with multiple local dealers is a big plus. Also, you will likely run into an option between stand on and sit down styles; personal preference, but sit downs are generally lower, but slightly longer, so consider what you’re most comfortable on and if height or length might be issues for you. Good luck!

Edit: Just to add on, I consider local servicing dealers to be critical, despite doing virtually all my own maintenance and repairs, because they should stock most commonly needed parts. Sure, I can order anything online, but immediate availability is a huge advantage to me, especially when I’m busy, as opposed to waiting even a day or 2 for a delivery.

I am of the opinion that I would rather have a used commercial machine than a new home owner machine. I have a Exmart that is basically a Toro. Bought it at the swap meet for $3500 around 2010. It had 350 hours on it. Has a Kawasaki engine that I had to split the case on because it was leaking oil too bad the drive belt was slipping. Had to replace coils in it twice, first tie they both died at the same time, engine was running and died. Second time they were getting weak and mower was hard to start. Just replaced carburetor, it was hunting real bad , could have put a kit in it but the carb was cheaper than the kit.
My neighbor bought a John Deere and it wouldn't start. He asked me to take a look at it and after looking I gave up. It has electronic ignition and fuel injection. Along with a place to pug in a lap top to diagnose. I will be running my Exmark a while longer.
One other thing, the handles, another neighbor had a Great Dane, the handles came up between your legs and bent out. You couldn't rest your arms on the seats arm rest and run the mower. wasn't comfortable to run. He replaced it with a Farris with full suspension. I didn't care for it either, it seemed to buck and when it happened it would get worse and you had to stop to stop it.