Thank you for your ideas. They were very helpful in many ways! I was at the architect today. He assured me that he will find a good solution for the utility room. All house connections as well as the electrical panel should find space behind the two doors. The controlled residential ventilation will be mounted quite high up, so that possibly even a small corner will remain. If there is interest in about half a year, I can gladly report here whether it fits ;)
We straightened the edge by planning a little more kitchen and a little less living room. Windows and doors have been moved. All in all, I already like it much better now, also thanks to some ideas here!
Financing suggestions are well-intentioned, but I never mentioned anywhere that I have money shortages. Therefore, I now cheekily leave them uncommented!
Many thanks!