House financially feasible at about 5,000 net?

Yes, interest rates and purchase price are closely connected because people can only afford to pay as much annuity as their salary allows at most. That is the limit. If interest rates become too expensive, the purchase price must go down.

Don't hold me to it, but these are presumably construction costs according to the architect's manual so and so. They are also included in the building application and serve as the basis for various costs. The actual costs are higher there, at least compared to what is stated in my building application

Shall I give you some examples from my commercial sector?
Construction costs € 42 million, sale unoccupied € 75 million, "KfW 55 promotion on top" € 4 million.
Construction costs € 39 million, property remains in own holdings (estimated sales price approx. € 60 million) with KfW 40EE, promotion € 7 million + € 3 million for job creation.

There you don’t need to have any pity and no one has to cry seriously there either. Sure, they especially complain...

okay fair point, then I don't come to 2,750 euros in the new building with us, but rather 3,500 euros. And the plot is 350 sqm larger. Location no difference. I'd still prefer the new building over an unsanitary 81-year-old building, wouldn't I ;)

Three years ago, I acquired my building land in exactly the same way. A 350sqm building plot was officially offered on a well-known portal. Due to its size, it was practically undevelopable. Below and above this plot were two orchard meadow parcels, also individually undevelopable due to their dimensions. The respective (older) owners were happy when I asked if they would sell... "It just causes work anyway" was the gist. The two sold so cheaply that it’s really not worth mentioning. Now I have over 2000sqm in a good location and didn’t pay much for it. And I claim that this still works today. Maybe not in the Munich commuter belt... okay