I have face the same condition during my college year, and I was regret that I didn't know what my friends know that time. That we can still working while studying, even become smarter than other, by taking a job that is aligned with our object study. For example, I was studying chemistry. Therefore the job that is suitable for me is become a tutor in a private course. A teacher payment is not so bad in my city. There are a lot of school student that needs a tutor, the market is never dead. And the more I teaching, the more money I get, the more smarter I am. The time to work is also flexible. It only require 2 hours per session. Maybe you can apply this example to suit your need.