Build new or wait for an affordable house to become available?

When I think about the fact that the tiled stove at my parents' house heats 120 sqm in an 80s house without any problems, I could write the infusion times on the front door of our passive house.

In the neighboring community, there is a young country doctor who came from the city.
Advantages as a country doctor
Better pay, better working hours, less weekend duty, more interesting work. Previously worked in a hospital in the city.

: has about 2800 "certificates" per quarter and says that he has far more than enough patients. I am absolutely sure that he doesn't have to worry financially.

That is more than enough, you have to be careful not to drown in work. For a financially good life, 1300-1600 are sufficient (at least here). This practice can easily support 2 doctors and there will still be enough work to do.

In the neighboring community there is a young country doctor who came from the city.
Advantages as a country doctor
Better salary, better working hours, less weekend duty, more interesting work. Previously worked in a hospital in the city

I can agree with that, but the fewer weekend and night shifts come from the comparison with the hospital. At least in the deep countryside, you often have to do more shifts compared to the established colleague in the city, but indeed still significantly fewer than in a hospital.

Approval in the city must first be obtained. It is said not to be that easy.

We once had a passive house with a pellet stove, worked great, I was thinking instead about the tile stove.

The main heating with firewood (and thus to be refilled manually) is something you have to want. I also once flirted with something like that, but a (normally) automatic and unattended heating system is already a great achievement, especially alongside work and family. Or also when you come back from a winter vacation and the house is warm.

and
You also took my remark somewhat out of context YES, I notice here in the region that the more "rural" areas are gaining growth again. However, we live here in the flight path to the Ruhr area and the accessibility of whatever and the infrastructure have to be right.
If I expressed myself ambiguously, I'm sorry, that was not intentional (maybe I also tried to phrase it a bit "friendlier" for the OP)

But I also wrote that I wouldn’t build there if it is VERY rural and I am burning money there. You didn’t quote that part anymore.

In general, I see it exactly the same way as has already been mentioned several times: the grandma around the corner does not replace existing infrastructure and eventually the grandma won’t be there anymore. Then the infrastructure will certainly be missing too.

Obviously, I expressed myself a bit oddly :P