Find employment from home. Aspiring actors who have the option to work from home often take the opportunity. This allows you to say "yes" to your agent every time he requests you for an audition. Saying "No, I have to work," too many times will stop him from submitting you for auditions.
Secure a flexible job. You don't necessarily have to work from home to have flexibility. A job as a real estate agent, for example, will give you the flexibility you need to go to whatever audition for which you are requested.
Work at night if you can't find a flexible job. Casting directors will usually audition people in the day, during regular business hours. Many actors take a job as a waiter or bartender to pay the bills as they try to make it in the industry.
Find time to train. No one said working full time and trying to become an actor would be easy. However, committing to 40 hours per week of work still leaves you with time to attend acting lessons. Working on your craft is just as important as paying the bills if your dream is to become a successful actor.
Bring your lines with you wherever you go. Many casting directors will provide you with lines, called sides in the industry, before the audition. Print them and study them whenever you have time. Enter into a recording device the lines of the opposite character -- if there is one -- so you can practice running your lines with the other character's lines.