I've held off college which while a bad decision, I had alot of other bad decisions to fix and it's just now finally correcting itself. But I can't really say what to do in your case. Teaching is good, but right now it's a really difficult area but if you enjoy it, go for it.
Up until the past couple of months, I've wanted to get A+ certified, get into computer hardware troubleshooting, etc..But then I realized that I enjoy computers as a hobby and not so much want a career. Then I realized I've always loved Meteorology and watching/figuring out weather (hell, today is going to have some hefty severe storms here probably so I'm giddy

) and have decided to settle on it.
Yeah, taking Calculus classes as a pre-req before getting into the course will suck but I'll manage. It won't be so bad in the end. As someone else said, I'd rather have a decent paying job that I enjoy, then a high paying job I hate. Once you lose that high paying job or quit, you'll most likely take a paycut since you never liked what you did in the first place, maybe starting back near the bottom, depending.