Being a bike mechanic was my dream. I was on the path, working as an apprentice, but in the end I had to get out of it. I was 25 making 10.50/hr, in debt, and the realization of the cost of tools was the kicker for me. Watching the techs around me spending money every week on tools/tool truck guy stressed me out. Working to pay for tools to do your job. That's kind of what I saw. If I would have started at 18-20ish, not thinking about getting married or a family, I'd have followed through with it forever.
So, I guess what I'm saying is, it is a HUGE financial investment. Make sure if you decide on this path, you can afford it.
I know there are guys here who currently are techs, maybe they'll tell you I'm totally off base, and I might be, but this was my experience.
Being shot out of a cannon will always be better than being squeezed out of a tube.
-Hunter S. Thompson