I've been scratchbuilding the first four yard structures at Orbisonia. I've used Northeastern batten and scribed wood overlaid on a foamcore shell. Some windows and the corrugated roof are Clever Models paper products. Paper glued to foamcore works out great.

The first structure is the car shops.

The boiler and coal bin were next.

Here's some shots  of the yard so far.

This shed was just rebuilt by a team of volunteers at the prototype EBT.

The next structure  to be made will be the foundry.