I don't understand why such large numbers for rural acreage. I bought seven acres rural a couple years ago, six is rectangled @ appr 680 wide by 420 deep, with one acre up front. It is by far more than needed for take-off's and landing's and so far I have not had one piece of beef complain about the over flight. There are no residences beyond the runway so it is just open blue skies with exception of a few grandfather oaks.