It may be helpful for us to have a look and express our views.
I don't think there is anything wrong with your girlfriend. You can find her a stable job there. Anyway, both of them should have a stable income, otherwise what will you do if the business fails? Do business or be big. Earn 3000 yuan a month. Is this business? You'd better get a real job. People who don't study are opening stores, and you still open stores when you go to school.