For a small lot of an acre size you'd be hard pressed to beat a Snapper rear engine rider. Last forever, when parts are needed they're cheap and the mowers simple and easy to fix. I've been mowing my acre lot for 16 years with a 28" cut 10 horse Snapper and it takes me under an hour easy. The mower is light and takes up little room .
The most common service, blade removal for sharpening, can be done simply by setting the mower up on it's end. Sometimes I don't even take the blade off.
The darn little suckers just don't seem to break or wear out.
Hell you could cut an acre lot with a push mower.