okay so I think the best process is to separate the house into XY * Z independent sections. If I separate the walls from floors I can more easily adjust heights of the ceiling without affecting the surrounding mesh. I think I'm going to have to do 2 more refined blockouts before I can start adding detail.
I increased the scale of the entire scene here by 10% It still felt a little small so I compared 110% to 120% 110 on the left, 120 on the right. I felt the Z value is too much at 120% but felt really good for the XY. It annoys me to much so much effort into real world scale and then learn it's better without it, that's why…