Budgeting tips when income drops, customer-service rep here

We are a household of 7 and the budget no longer works. There are 7 people counting on me, so I am trying to be careful. The rent is fixed and the car payment is high. Any apps or methods?

Sell things you do not use. I made about $900 from a weekend of listing.

Check for energy assistance programmes. I got a credit that covered two bills.