University education always costs money - whether at home or abroad. Alongside tuition fees, initially a complete basic requirement of books and material is needed (i.e. a computer and office equipment) and perhaps an apartment with the necessary furniture.
Then, of course, there are the costs for insurance, clothes, food, trips back home, leisure time etc. The German students association has researched the cost of living for students and found these to be approx. between 7,000 - 9,000 Euro per year (that makes 550-780 Euro per month).
To find more information on how to fincance your studies, click here.