And what is the link to the long thread?
It is in the same section as the "Construction costs are currently skyrocketing" thread. But don’t expect any huge amazing comparison possibilities there. Roughly every few pages there is something related to the topic with more current numbers ("I just bought this or that material/service for xy euros" or very rarely, an actual conclusion after a completed build), and otherwise there are hundreds of pages of digressions in many directions (e.g. the mention of energy costs in some form regularly triggers fundamental discussions about the energy transition :p)
Otherwise, I can’t contribute much of what you might have hoped for. We are having a terraced house built by a developer, where own work is explicitly excluded. So we are not even builders ourselves (that’s the developer) but rather buyers and at the other end of the own work spectrum. Probably especially so with us, because our developer includes significantly more than many others (aka floors at least a base level, painting, a finished garage, paving of the terrace and driveway, even a small hedge (only because it was imposed by the city) are all typical things that you often do yourself with developer projects, but with us the developer does them). Our fixed price is 515k for the terraced end house with a basement (143 sqm living space, + basement + finished garage) on about 210 sqm of land in a mid-sized city in the Ruhr area with good connections to the nearest major city. It is not the final price yet because upgrades haven’t been done, although we are basically at the point of “actually everything or more that we see as ‘must have’ is already included in the base price. Everything beyond that is in the ‘nice to have’ range”. Overall, we would have trusted ourselves to do some own work as well, but something like what you are doing would never have been realistic for us. Otherwise, the whole framework worked for us in this project, which was not necessarily the case elsewhere. (e.g. there were other developer projects about 100k cheaper, where more own work would have been required in the end, but usually other things didn’t fit properly from the start or it was foreseeable that we would massively upgrade). So we had the feeling here of “it’s expensive but it fits”. Now we await what the next year will bring and wave at you once with our empty wallet ;)