We had had all variants of the calculation in the early stage.
You can only compare the offers with great difficulty. Behind each offer is the [Bauleistungsbeschreibung]. It is different for each one. Our experience has only shown that the "expensive" ones did not necessarily have the most expensive price for us. Muster sampling costs, demustering doesn't bring much. Many costs were included in the "expensive" ones, for which others had the word "bauseits."
In the end, we did not decide based on the number on the offer. The price was not out of the range, that was enough for us. Transparency, flexibility, the feeling of being taken seriously, a site manager who was already involved in the offer phase, no flat sales pitches, the approach to the project, the overall concept were decisive.