Let me add: Even though my career pursuit has shifted, I'll always be involved in music for it is definitely one of, if not wholly, my biggest passions. You're playing with cards when you try to break in to and "make it" in the music business and for some that's too much ambiguity to stomach. Doing a full time job and music on the side never hurt any body and I know many people that do this. I don't think it's always wise to put all your eggs in one basket in regards to this subject. It's all too easy to pay your way through a trade/music school and end up not much further past where you started. Like I said, the skills are only a small portion of assets you'll need. There's always those special situations where a pretty voice will be heard and the next thing you know, she's got a record contract and is making platinum selling albums. These cases are by far and large in the minority. Be wise, be careful but don't give up on your passions.
edit: Niki, I'm only speaking generally and not directly to you. If that thrill of the ups-and-downs and inconsitencies is intriguing and an appeal to you, that's awesome and I hope it works in your benefit. Really. Good luck on your endeavours.