Land available - ancillary construction costs, ancillary house costs, financing?

Why nonsense? Before construction starts, the civil engineer wants an additional 50,000k. Planned were 10-15,000k. The shell builder is at the starting blocks and threatens with costs for every day he can't be on the construction site. Painter costs from Q2 to Q4 another 30,000k. Cistern demanded by the municipal utilities 5,000k, electrician with KNX smart home, a guy doesn't treat himself to anything else, another 30,000k, terrace, driveway and garden another 30,000k, etc. Over the course of the house construction, some additional costs arise. There are enough builders who run out of money exactly for these reasons and then either have to live in a shell or are completely insolvent.

Why nonsense? Before construction starts, the civil engineer wants an additional 50,000k. Planned were 10-15,000k. The shell builder is ready to go and threatens with costs for every day he cannot access the construction site. Painter costs from Q2 to Q4 another 30,000k. Cistern demanded by the municipal utilities 5,000k, electrician with KNX smart home, a man doesn’t indulge himself otherwise, another 30,000k, terrace, driveway and garden another 30,000k, etc. Over the course of the house construction, several additional costs arise. There are plenty of builders who run out of money for exactly these reasons and then either have to live in a shell home or become completely insolvent.

Some additional costs arise during the course of building the house.

The civil engineer wants an additional +50,000 €? Then the whole thing wasn’t planned very well, to say the least.

You're not by any chance talking about your own experiences and now want to convert everyone, but not build yourself? Sounds like it.

Before starting construction, the civil engineer wanted an additional 50000k from me.