this is truly magnificent!
Awesome work there .

One small notice: the edge between wall and floor in the second picture, will it have a better seam when they are finished? Looks a littlebit... empty to me .
P.S. so is the case with the roof intersection on the last .
Would also be cool if theres a little bit of algae on the walls and rooftops, makes it more natural.

Again, fantastic work there !