Property developer in Schleswig-Holstein wanted. Who can recommend one?

He means you should get yourself a decent inheritance so that you can pay for your house. With your current budget, that's not possible...

Who or what is Erbtante?

By that, means that you need even more money to finance your house. According to him, €250,000 is not enough.
In this respect, one option would be to bring the inheritance aunt on board.
It's a saying, you can also ask the bank.

What does "to bring on board" mean? To involve in the project.

I think it's great to get feedback from you, so thanks in advance. I had thought of the answer with inheritance, but it seemed too simple to me and unfortunately doesn’t exist. I would also take a bungalow, and if I think about it, 109 sqm plus 18 garage and everything around for 210, take away the garage, I’ll do the garden myself, then a bungalow with 120 should be possible, that’s how it sounds to me (who was the general contractor?). It is supposed to be built in Norderstedt, any recommendations for companies? I have already read quite a lot of bad things about Team Massivbau here. Does anyone know Trave Haus? : hehe, had to smile.

Unfortunately, I don't know Trave Haus. Team massiv is building 3 single-family homes next to us. None of the three constructions are progressing at express train speed, but all are moving forward continuously. All three properties are simple standard houses where the craftsmen can work in a routine manner and deliver a decent job. I was at Specht, Bisdorf-Fehmarn. But he certainly doesn't drive to Norderstedt. ECOHaus NMS will do that, it's not far via the A7. Just ask them too. Karsten