I have to agree that Zero Turn is the way to go if you don't need the other capabilities of a garden tractor.
I don't have enough grass to cut anymore as I've covered a lot of it with roofs. I have a total of about 3/4 acre to mow out of about 4-1/4 acres of property.
I have two properties and don't want to haul the equipment around all the time so I keep another used tractor at the other place.
I have this habit of picking up old garden tractors at the local auction. That's pretty much all I use to cut my two properties... old used equipment.
For my rental property I use this 1970's vintage Sears GT-16 that I picked up at auction for $150. Put a new carb on the old overhead valve Tecumseh. The tractor over all is in near new condition mechanically. The mower deck is solid, bearings are tight. Cuts grass beautifully.
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For my house I use a 1986 or so Ariens GT-17. These garden tractors are beasts. I picked this one up for $400 at auction. Needed nothing. Used it all last year. This year I had to replace all of the hydraulic lines as they all started spraying. Just took them to the hyd hose place. They copied them. Cost $80 for all four.
This machine is fully hydraulic. It even has a hyd lift for the mower.
The mower is driven by a small automotive style driveshaft with splines, u-joints and get this... grease fittings.
I don't have a good picture of it handy.
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Recently I picked up this old 1960 Wagner for $100. Sold it on ebay as-is for $865. Guy drove all the way from Ohio to SE PA to pick it up.
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Couple of years ago I got this 1978 Sears ST-16 at auction for around $400. Ended up it was barely ever used and in almost brand new condition. Still had the nubs on the tires. Sold it on ebay for $1875. Same thing... guy drove all the way from VA to pick it up.
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So not only do I cut my grass with used equipment, I pretty much have more money than I started with selling the others!