One bullet point of preparedness is having a strong network. That means a group of friends and family willing to work together in a crisis. Think about filling all the bases.
Mechanics to keep vehicles running.
A doctor, nurse, or some type of medic to keep you alive.
Someone that knows how to grow a garden.
Plenty of shooters for protection.
Someone has to hunt, skin, and keep the group in meat.
If your plan is to stay in the city some jobs may very but the spirit of the law remains. Put your network together with care and know that in the worst situations that you have fewer things to worry about.