Odds of Getting In
Very good. Despite the sad state of the economy, people will always seek out entertainment, and as long as people are seeking out entertainment, the Hollywood gears will keep on grindin'. Even if the current trend of fewer motion pictures being made continues, mixers will still be needed for commercials and plenty of the television programs that feature above average production value.
Like we said, you may have to put in your time learning the ropes as a boom operator, but if your arms haven't fallen off by the time you're thirty, you should have a good chance of moving on up to mixing.