If you work a 9-5, consider doing freelance work.
Although it does not have guaranteed hours or schedules, you will be able to make more hourly.
If cash flow is a problem you can turn a hobby, such as photography, into a supplemental source of income. You can also turn hobbies like playing an instrument into lessons or even start bartending at a restaurant.
If you don't have a specific hobby check out pennyhoarder.com for money making tips. If you don't mind doing a few things or not sure what you would like, try taskrabbit.com for freelance tasks. Another great site is dogvacay.com where you can babysit dogs and get paid for it.
Freelance work will also free you up for more auditions and more opportunities to shoot. Working a 9-5, you realistically only get to shoot on the weekends.
To leap forward in your career, consider freelancing.