when I clicked on the thread, I thought you were buying a multi-million property - now I see you buy a studio ...
You want to have a survey done? For that?
No private buyer (sell, next to none) would do a survey for that.
Remember:
beauty is in the eye of the beholder.
I´d still do DD, like written confirmation that it´s not Erbbaurecht and a breakdown of the community charges from the Admin.
If there´s something fishy, you would most likely spot it there.
Enjoy your apartment!