Agree with Dara on this one. You'll need every penny by the time you get the safety pilot signed off and actually earn some dosh. Then you'll have to wait until the 13th of the next month to see it. From EMA to money in the bank it'll be around 5 months.
Re Arlanda, the best thing is to stay with the other members of your group, especially your sim partner. All 12 cadets on my course stayed at Bokloster. It made study sessions easier and advice was always just a knock away. Beware of Kung Karls nightclub in Marsta though...the women are stunning..but they do like to slap if you get too close!!