I’ve started building a Pennsylvania bank barn typical of the barns built in my area by the German immigrants in the 18th and 19th Centuries. They were constructed with access to two levels, usually with a built-up bank or cut into a slope facing north for protection from the harsh winter winds. The main door was for access to the upper level which contained hay storage, a threshing floor, a tack room and a grainery. The lower level facing south, was for animal stalls with cross ventilation openings built into the stone foundation walls. Many barns would have a cupola on the roof for ventilation and access for maintaining the roof. The distinguishing cantilevered forebay was to provide cover for the stall doors and ventilate the grainery above.
I may model it as if it is under construction to be able to view the detail framing. My joinery is with CA glue not all the extravagant mortise tenon and pegs. I’ll just need to build some ladders, scaffolding and find a few workmen to complete the effect.