I observe. The room layout on the ground floor fits perfectly with the cardinal directions and does not need to be changed. Kitchen in SE, living room in S and SW up to NW. Fits. The ground floor can remain open if desired, although I would reconsider the staircase a bit. Whether a stairwell partially separated from the living room would not be more practical, even if it had little style. The upper floor fits quite well. I would improve the bedroom by placing the little ironing room to the northeast and the bedroom to the SE. I would add a wall or something similar to the gallery and use it as a storage room. Now we have to wait and see how the prices turn out. Savings potential would be Hansapor instead of Ytong. Instead of floor-to-ceiling windows, regular windows. All windows in standard hardware store size rough opening 102.