Trimming expenses while I search - 14 months and counting

We are a household of 16 and need to cut costs quickly. I have read a lot of threads here and could not find my exact situation. Rent and the car are the biggest costs. What did you cut first?

A simple budget with three columns, fixed, flexible and optional, made decisions faster.

I called the landlord and the card company early. Both offered a short payment plan, which I did not expect.