The more, the merrier
If two students want to share a room, both of them will save 31€ each if they only stay for one week. If they stay for two weeks, the amount will increase to 50€ each.
On top of that, if you enroll with two more friends, you will be saving 10€ each on a one-week stay, and 18€ each if there are five of you. And then. the cherry on top of the cherry. If all of you stay in double rooms, then you will get even bigger discounts.
Food is not included, when staying in an apartment. If you plan to cook, you will spend around 5€ to 10€ per person daily.