This means that it will soon be possible to buy a cheap (and ugly) 1 to 2 room 25-35 m² apartment in a big german city. Interest will go down, I'm pretty sure. There are A LOT of singles, students and migrants looking for a cheap apartment to rent and there are not enough rental apartments on the market in Germany. For landlord it means: A loss of rent is almost zero because in Germany the state pays the rent for welfare recipients.