It is a tough lawn. Many trees, hills, long fence, driveway couple buildings and a garden plot or 2. Push mower iis not self propelled. It is my trimming mower and I was rebuilding the engine on the riding one. If I was dork enough to wear a gps watch my map would look quite different

Also I would like to point out that mowing a full 20" swath for the area of an acre with no overlap is 5 miles. At least that's how the math works out.

To the OP. I would get a wide self propelled walk behind.