On the subject of self-awarding / external awarding: We also struggled for a long time whether we should organize the trades ourselves or not. My wife and I both have a business administration background and are executives at large employers in the corporate sector. That means we are not easily taken advantage of – but we had rather limited knowledge about construction. Our house was ultimately planned by an architect up to the building permit. From that point on, we organized everything ourselves. We held countless consultation meetings with craftsmen for the individual trades and mostly chose the high-quality execution of the trade. Usually, we proceeded as follows: We sought advice from a craftsman with a very good reputation and had him prepare an offer. Then we took the items from the offer (without prices) and sent them to other possible providers for the same trade. Depending on the trade, we then held 2-3 more consultation meetings and refined the scope of the trade until we knew exactly what we wanted. In the end, we had 2-5 offers per trade. We did not always choose the cheapest but rather the one with the best mix of competence, price (and honesty). We have a hillside house with 3 floor slabs (staggered construction) and top equipment (e.g. BUS system, large windows, wooden floors, large tiles, photovoltaics incl. 10KWP + storage, room height 2.8-3.2m). So far, we have had significantly fewer problems than our neighbors with a general contractor. In case of problems, the craftsmen are also much more accessible than with the neighbors who have a general contractor (they push down the prices, choose the cheapest if in doubt, and the craftsmen are frustrated because of small margins). According to the architect, the quality of the trades is also very good so far (we just finished the interior plaster). Price-wise, we are better off than our neighbors with a general contractor (even though we have much better equipment). It is certainly laborious, but with the necessary business acumen and motivation, in my opinion, self-awarding is always better than a general contractor.