Work?!?
zaslal Frank (confidential) v Fórum Nemecko
You are wrong!
First, on a student visa you are only allowed limited work related to your studies. Such occasional part-time jobs are badly paid and it is not possible to earn your living expenses that way.
Also, studies in Germany are designed to be full-time and your results will suffer if you spend some of that time on work.
Thus it will not work the way you dream of, even if you manage to find a sponsor (which I doubt you will).