The BU makes the prices I want to remove so cheap that I can hardly go to another one. And adds that to the rest of the shell construction...
This is common with a general contractor, that removing something basically never pays off. The cost savings are usually lower than the material price if you provide the parts yourself. Why is that? Because companies can do that. If you build without a GC, you have to manage each trade yourself. That can save money, but is almost incalculable and often you won’t find anyone to do the work then.
Yes I know it’s not much cheaper, we’re working on it, it’s more difficult than I initially imagined.
Unfortunately, that’s the problem when you’re first asked “what would you like” and only afterwards the price comes. Removing is much harder than adding something. And thanks to the great order situation, companies simply increase their margins so that nobody gets away with too low a price. In the end, you only have the option to really save something. As already said, basement or chimney or simply a few square meters smaller. If you still have a reasonable amount left per month in the house, you could also save some things yourself afterwards (e.g. outdoor area, which easily costs 50,000€ including carport/paving work). Otherwise, you could look for another GC. There are apparently some where the removal of trades results in actual cost reductions.