On Bellmont I used all Scalescenes Texture sheets. On the Ballywillan Station house, I created the stone work from photos of the building, using Inkscape. The slates on both buildings are Scalescenes.
I will include a coin in the next photo I post. I will post some more photos of my completed buildings.
N scale is fiddly and in the case of Bellmont I had to simplify the portico, which has a lot of fine carved detail, I could not replicate in N but could be done in OO.
The biggest problem I had to overcome was impatience, cutting corners in my rush to see a finished product. It helps that I am a musician, it is like mastering a musical instrument, or a musical genre, keep repeating until you get it right and eventually you develop muscle memory.