Why are the queues for single rooms so long?

The Student Village manages approximately 3 200 places and only about a hundred of them are single rooms. There is a high demand for single rooms but they are seldom vacated. Therefore it may take approximately a year or a year and a half to get a single room. So you could at first apply for a place in a room (or a twin room for one person, if available) and then, once you have a place, wait for a single room.