Is there money in web development?

/prog/
I'm currently working on an arts degree and failing hard. None of this shit interests me. I miss at least 25% of my classes. I think I've already dashed my hopes of becoming a teacher (what I want most).

I'm good with PHP, JavaScript and CSS. Can I make a living off that if/when my current plans fall through? My IT education is 100% informal. I have no payed experience.

I'm Jeff, but not that Jeff.

I'm a professional web developer--I don't really touch "design" at all, but focus on databases and application logic.  I make $90K a year, with a degree in English & music, working from home.  If I had a technical degree I'm sure I'd be doing better, ditto if I had been willing to get into management.

I can't imagine I'd be doing that well if I were freelancing--I work for a company that makes healthcare-related software, with huge state-level contracts, hospital deployments, etc.

Feel free to ask real questions and I'll do my best to answer, I'm not in a trolling mood.