What I see is window cut outs are cleanly stamped out. How was this done home made? The green wire platform roof supports are heavy gauge wire, the circles are too perfect to be bent without machine help. The cream colored station paint was applied by a machine. If it was homemade, it would have been painted by hand. Also the patina and chips in the corners of station. I still say not homemade. Maybe Vollmer or Kibri. More picture would help. Underside of station and platform roof, inside the station building may provide more clues.