Advice would be greatly appreciated!!

Ok, so I'm pregnant with my second child. My first is a 6 year old boy. I'm going to be quitting my job soon to be a stay at home mom again. Here's my dilemma. I would like to help bring in some money for my family but I have no choice but to be a stay at home mom because my husband travels for work and we don't live near family. I've looked into medical billing and coding. It's a job I could do from home in as little as a year (I have to take classes and become certified). But my husband wants to also continue his schooling and get a degree. We can only afford for one of us to take classes. It's very expensive, as I'm sure you all know. My husband has 70 credits he can transfer. Should I let him finish his schooling first as he is closer to a degree, or should I do my classes and get my certification in medical billing and coding? I know this doesn't have much to do with pregnancy, but I'm pretty sure I'll get more replies here than in a different forum. Advice?