you own the airspace up to the highest point of your property
Nope. Part 103 pilots often fly inches off the ground and it’s totally legal- usually farm fields. This is called class G airspace and extends from surface to 700 or 1200 ft AGL. The United States government has exclusive sovereignty of airspace in the US from the surface up, and any citizen has the right of transit through that airspace.
That’s coming very soon. Probably next week