Zero-turn mowers are wonderful machines.
I don't own one and can't afford the cost for myself, but, watching them work is a sight to see. ZTRs are generally overpowered for their deck-size and overbuilt for their horsepower.
How many broke down zero-turn threads do you see on here?
Credit where credit is do. Do all property owners need one? No, would just be serious overkill.
Do people cutting multiple acres with time as an issue need one? They are to be seriously looked at because they are proven pieces of equipment.