I quite agree with advantages and disadvantages to teaching. I consider myself of the very lucky teachers. I alternatively certified which means my degrees are not in education. I am a trained chemist and physicist. I went into teaching after being an engineer for many years. Now I consult in those fields and sometimes write for textbook publishers.
Yes, teachers get warm squishy feelings once in a while. Yes, it is rewarding. I just wish people would stop thinking teachers work 8-3 and have summers off. Education is one field where continueing education is required, higher degrees are preferred, but there is no pay reward or assistance for doing so. In my area the pay difference between a bachelors degree and a masters is $500/year. That doesn't pay for 1 hour of graduate school.
If you are going to go back to school, make sure that the field you are entering is going to allow you to pay back your loans otherwise you are back to square one financially.