If I didn't have the option to install a Rohn tower. (I have two) I would go w/ the tripod mount.
I always recommend the 2X4 spreader strips underneath, too.
You should drill pilot holes first,so you don't risk snapping a lag bolt.
Don't worry about the neighbors, or those silly HOA rules, they are meaningless and unenforceable and the HOAs know it.
They just hope that you don't.
http://www.fcc.gov/guides/over-air-r...n-devices-rule