Construction company wanted in the Stuttgart metropolitan area!

So if I look at the offer at the very beginning, the following already stands out to me.

The prefabricated garage costs 9500 euros. If I look on the internet, the same garage in concrete, plastered with crane delivery on the 7x3m plot costs 3625.00 euros. Just an example. Do I really have to throw almost 6000 euros out the window?

If you continue like this, the thousands just keep dropping. And turnkey was and still is expensive.

You really held talks with 20 companies and obtained offers....???

So if I look at the offer at the very front, I immediately notice the following.

Which post are you referring to?

You apparently have a different understanding of comparability or you haven’t been reading here long enough.

Well, I’m not comparing a solid house with a wooden house. You just have to pick out what interests you, for example, which ventilation system is installed, how large are the standard roof windows, what material the interior walls are made of... I don’t deny that this is very cumbersome. I’m actually lamenting here that comparability is difficult because you can’t just place the information side by side like a table.

asking around a bit and choosing a few favorites from recommendations (e.g., in new development areas) to then look at more closely, or also then taking up the personal conversation.

That’s a good idea, but many “new development areas” in urban environments are practically large multi-family apartment blocks or endless townhouse settlements. Single-family homes are rather rare there; you’d have to go further out into the countryside and approach complete strangers. Asking around then sometimes leads to funny results like “We just felt well looked after,” “It just fit,” or “They sensed what we wanted,” or “They just matched our taste,” or “We were lucky, everything went well with them.” That only helps you to a limited extent. And as it’s said in the other, actually correct forum section for this discussion: There are also black sheep consultants / construction manager sheep at construction company XY here and there. I think it therefore makes sense to take the hard facts from a construction service description and make a decision from them.

to be taken by the hand sales-advisor-style

What is that supposed to mean?

wanting to recognize for the further procedure whether you are a prospect or a last-price requester.

Here I don’t understand the meaning of the maximally complicated wording. Why am I not a prospect (but a bad “last-price requester” – I love framing and labeling!) if I want the construction service description and concrete prices (including options) without much beating around the bush and two hours of harming the climate by a car ride? By the way, I am surprised that you want to know so exactly what the advisors think about customers – have you ever worked as one or do you work as one?

You criticize that the glossy brochures have no meaningful content, but when a provider invites you, it is too far for you to travel..

Why should I look at factory halls ("How great our new machines are"), I don't want to buy a factory or machines, but rather a honest and open builder in their house who tells me what went well or badly with the company :) Pre-sampling may make sense if you only have 1-2 providers who are even in question at all. But are great tiles and stylish fittings a good decision criterion for working with this or that construction company?

Listening in sometimes leads to funny results like "We just felt well taken care of," "It just fit," or "They sensed what we wanted," or "They just hit our taste," or "We were lucky, everything went well with them." That only helps you to a limited extent.

That may be emotional nonsense without informational value for you (are you generally just a Blue type or even specifically autistic?), but the respondents can't know that and don't say it to annoy you and/or make you think they're stupid. People like you can make use of such answers and feel helped by them. The majority of people are neurotypical and are not satisfactorily trained for emotionless-parametric answers.

Here I don't understand the purpose of the maximally complicated wording. Why am I not a prospect [...], if I want the construction service description and concrete prices (including options) without much fuss [...]?

The construction service description should be easy to find and downloadable without registration; I agree with you on that. Completely exposing their price calculations is understandably an unpleasant prospect for providers. And it's neither necessary nor justified because no customer will potentially buy a huge box of chocolates with one house of every model. Preparing the information materials requires considerable effort—one doesn't want to just fire off a broad salvo. No salesperson loves the brochure (called "see-people" at trade fairs) collectors (or in relation to the Blue type: datasheet collectors).

By the way, I'm surprised that you want to know so precisely what consultants think about customers—have you ever worked as one or are you working as one?

I know what providers think about inquirers. The construction industry has been my world since the early 80s, and by now I look back on thirty years of activity as, to put it casually, a professional tender preparer. Technical salespeople are quite often my lunch companions.