Another big thing to keep in mind, our visitors, both railfan and non railfan already comment on how "crowded" our main yard looks from buildings. Often reffered to as "Tent City", our campus is starting to appear more modern and loose its historical appearance. Imagine how more cluttered it will look when a roundhouse and coal facility are built.
Might as well build one giant pole barn over the parkong lot, add a few rooms as needed, then we have a place to house our tired vehicles, etc.