So on this topic I can only recommend the following to everyone. I rented a hall of about 100m2 and drew the floor plan of the ground floor and upper floor and recreated it with cardboard boxes. It doesn’t look that great but you get a very good feeling for what you decided on paper. For example, we adjusted several windows or changed rooms. On paper, everything might work but when you walk through the house under real conditions you quickly notice what works and what doesn’t. I can only recommend this to everyone.