You start buying up land and housing for you, your friends, their friends, their girlfriends. You manage to snap it up on the cheap, thanks to the housing downturn; before long, you own five city blocks. You declare this area to be a breakway republic, a break away state! An independent country where you make the laws!
Sadly, the federal government is not going for it. Uncle Sam demands you surrender within seven days or it's war!