It looks great, are the white areas walking space?
How will you turn your engines, the loop on the left side area (of the yard) can be used, but can you place a Wye closer to the yard or maybe a turntable?
I recently saw Keystoned Ed's PRR 2-rail layout nearby in Williamsburg and large layouts like his and yours are simply fantastic. His rendition of Horseshoe Curve had more track in it than my entire layout
Hope to see more progress photos soon!