Dietlinde mentions that having that many people eating in the kitchen won't be practical. Perhaps the room labelled "Guest room" in the second house might be better if it was a hall. Perhaps even merged with the hallway, or simply seperated by an archway of some sort.
How would the hearth be arranged? You were granted the rights for six hearths for your community, as per the document Dietlinde obtained for you. The small houses each require one each, so that leaves only 4 hearths available for the large houses.