Restaurants, my man! I worked at the CCF at the mall for years. In times were 445 or 530pm for most weeknight shifts. Make a decent bit of cash that night, you get out what you put in, and as long as you don't fall into the drug/drinking trap of working in a restaurant you can make decent money. You can make your extra 1k a month doing just weekend shifts, if need be.

Also, consider where you can cut back. Make sure you're shopping cheap for food, eating in not out, etc. Stuff you probably already know, but it's helpful to think about still.