How much does the sky over Berlin cost?

As everywhere else in the world, in Berlin also, the biggest money issue is renting a flat.
We currently live in Friedrichshain, in 60 square meters, which is a smaller apartment here. The building is completely new and is located in an ultra-fancy complex that enters the gate by typing the code. All buildings in this complex have a camera at the entrance, a flat access, a huge elevator, a cellar and a garage.