Depends on the quality of the zero-turn. In my experience, a big box store mower (of any type) hasn't generally hasn't lasted more than 1 year per $1000 spent (went through multiple before buying my
L3560). Which has pretty much given me the impression that air-cooled engines just don't like being run long & hard in hot Alabama summers.
Could I have fixed them and gotten longer use? yeah probably, but at that price I'd rather not be rebuilding the engine (or chasing down other problems) every few years -- especially when the grass isn't getting mowed because the mower needs repairs (again).
Granted a commercial zero-turn will likely last longer per $1k spent, but the bottom price will very likely be higher -- and it still won't have a loader.
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