Man, if you spend over 2 weeks in that hostel, they will make you an offer if theres something available... As for your budget, ALBERT HEIJN !!!!!!!!!!!!!! You should live out of this place and know where they ALL are... They not only sell cheap groceries, but cheap prepared meals to go in the micro, packaged sandwiches..... CHEAP!!!!!!!!!!!! But,,,,,, room temp beer..... Trust me on this one, it has everything... Your budget depending on beer and pot expenses should be less than 20 Euro a day. But like I said consumption adds up