What is the best way to keep neighborhood cats out of my yard?”
A few things I have tried that seem to work, but it might be tricky with that much area… 1) motion sensitive sprinkers. 2) Chili powder. Buy it in bulk and sprinkle it anywhere they like to use as a toilet. They sniff first and then don’t like the burning. 3) Dilute Pinesol with water following the surface and floor cleaning directions on the bottle and put it in a spray bottle and mist it around the area they like. They dislike the smell. 4) Moth balls, spread them around, same idea as 4. We had a crazy cat lady neighbor with 40+ cats and got driven insane with all their spraying and pooping around our house. These things seemed to keep them away. They need to be redone after rain though. Good luck.