I don’t understand why you think one person will kick in your door instead of 1000.
All guns are a good idea.
I suppose I’m largely talking to men here but please, please, get an AR and a few nearby friends that have them as well. Find chokepoints between your neighborhood and the bad part of town (bridges are good). At the very least understand how to build and defend checkpoints/barricades.
We are talking about mobs of lunatics in the thousands. They are not going to run off. If they progress things further and march into your area, you need to be ready to repel.