There it shows again: the more money you have, the more money you also spend. This does not mean that you can now build very cheaply, but that it does not have to be as expensive as the general statements here often suggest. Furthermore, it must be differentiated whether, for example, 40sqm or 150sqm need to be paved. Whether it is the chimney from the chimney builder for 30k or the DIY store stove for 2k. Whether it is wooden windows or PVC windows. Gas or geothermal energy. Roof with many dormers, skylights, projections, etc. It also depends on the builders how much time they want and can invest in research, offers, personal contribution, [KONTAKTE]. Some want everything finished immediately and see it as a given, others move into the house while the facade is not plastered, the garage is still being built, and the exterior area is still a dream. By the way, exterior area is not the same as exterior area. Rolled lawn vs. grass seed, chain link fence vs. forged custom design. This runs like a red thread through the construction. By [KONTAKTE], I did not mean illegal work either. I meant, for example, friends who are craftsmen and only charge for their labor time and do not add a surcharge to their wholesale discount. Good luck with your further research