It's HIS property, He can do as he pleases (within the confines of the law) Same as hosting a party or working on a truck.
A long as there'e no ricochets or stray rounds landing off his property, he's within his rights.
Neighbors cannot dictate how one acts on their property, Period....
You're laughable.
I don't know about Florida but around here if the neighbor's teenagers are having a too-loud party, the cops come and shut 'em down.