(For the uninitiated, the government [and sponsored co-ops] owns almost half the housing in Vienna, and eligibility for social housing, which is seen as desirable, extends deep into the middle class.)
In general, the Vienna model is very difficult to copy without being in extreme conditions: https://www.threads.com/@__smiz/post/Cxpz28CIkT6
Like Berlin, Vienna had occupation zones, but there was never a wall between them.
You just made it up.