“And one other thing I believe (though I’m not sure) that you can’t discriminate sales on the basis of race etc. “
Fair Housing Laws do not prohibit discriminating against a person due to political persuasion.
“One way MIGHT be to restrict voting in you new location for something like 5 years.”
So you want the Government to fix it?
Your idea won’t work without coercion. Try telling the people in an area that they can’t sell to someone of a particular political persuasion. that’s a total joke. IF you read my response I proposed a 5 year residency requirement prior to voting, so yes I guess that would be a government solution.