Construction costs are currently skyrocketing

Show me the family that builds with €60,000 gross, at today's prices and interest rates

4 children, €90,000 gross. Depending on the definition of taxable income, it can also be a gross income of €100,000. This funding is intended for these families.

...and without any judgment, but just to get out of the tunnel vision for a moment: Property = newly built single-family house?

What about buying used/existing property? What about [ETW]?

As I have read, only new construction is expressly promoted.

As far as I have read, only new construction is explicitly subsidized.

I have read it differently... but it doesn't have to be correct.

I have read 350 million for the district mentioned here (families / income limit etc.) for home ownership (without more precise definition) and a further 650 million for other districts (including cooperatives etc. for multi-family housing construction etc.).

Not everyone built in the past either.

when was it ever so easy to acquire home ownership in the past?

In my impression, "in the past" people with less well-paid jobs also built, and often single earners as well.

But you are leaving out the €10,000 higher limit per additional child.

I did not leave that out, but for reasons of time and space did not include all details and conditions, as I assumed that anyone interested would google it afterwards. ;-)

In my impression, "in the past" people with less well-paid jobs also built houses and often there was only one breadwinner.

The home ownership rate has been relatively constant since the 70s. It went up around the time of reunification.

In the past, with one breadwinner, the living space was smaller, the houses simpler. Children's bathrooms, dressing rooms, move-in ready homes, landscaping, all inventions of modern times. Plus little things like more power outlets, more lighting, etc.
Life was simpler back then when one income had to suffice. Long-distance travel, cable TV, internet, multiple phones, multiple TV sets, various electronic gadgets, the second car, etc. did not exist. Instead, there was the Sunday roast, clothes were worn out and patched. The snack back then was a thermos and a sandwich. No coffee-to-go with sandwiches and pastries from the bakery, what was delivery service anyway?
Life was different.