And it's taxpayer funded, to boot. I definitely wouldn't be happy as an Austrian if I knew my taxes were going to something like this (meanwhile hobbyists elsewhere do projects like this on their own dime).
Governments have long funded artistic projects. I'm sure some people oppose government funding for the arts, but there's nothing unusual about it. Obviously, not all artists get government funding, but such funding is an established process.
However in a brief visit to Vienna I was blown away by the city. It’s amazing, and wish my city had a fraction the arts, sites and budget that Vienna seems to have had for a huge period of time.