I would be more concerned with the accountant or mechanic with two toddlers living next door than with thugs. After a few days not being able to feed the babies, he will kill you for can of beans. Even if you give them a few days worth of food they will be back and may even let the neighbors know you have food. Soon the whole complex will be at your door.

You wont have enough ammo or food and the resulting mob will take all from you.

Hunkering down in the city is a death sentence. When shit hits fan you must get out ASAP. Best to do it now.

If you're unarmed, you are a victim.