The government is actually on the side of us common schmoes on this one.
http://www.fcc.gov/guides/over-air-r...n-devices-rule
HOAs know about this, they're hoping the people are too dumb to know about it.
If they harass you, report them to the FCC.
Your setup will be based on how many TVs you're feeding, which channels you want and how many people will be sharing the TV(s).