We need to have the same building structure and roof height and color, but the windows can be adjusted according to taste. Whether this is permissible will only be known once we submit the building permit application. To be honest, I do not like my neighbor's irregular window pattern.
Regarding the other question, with three children we have to cook a lot every day, and it is not very rustic with all the smell and smoke going into the living room, which is occupied most of the time. Hence the closed kitchen. Although with a pocket sliding door, we give it the character of an open kitchen when we have guests, etc.
Regarding the question of only 2 children's rooms, I expect that the little ones will share a room for now, and until the older one grows up, we will develop the attic, which will have about 30 square meters over 2 m.
Since we receive friends and family from various parts of Europe and abroad at least twice a year for 2-3 weeks, a guest room on the ground floor is also very important to us.
Now all of this has to fit into this floor plan :)