I am posting this to share what can be done with an MTH stone mill. The foundation for the added porch is from a 2nd mill. It could also have been built with stick wood to save using two buildings.
I sanded off the corrugations on the roofs and added slate shingles from Builders in Scale.
Eventually this will get a water wheel on the back side and some larger foundation stones on the back side where the ground drops off for the water wheel.
Posts and details are from Grandtline.