Western Maryland around the room layout

Greetings.  I am searching for a track plan to fit into a 20'x28' space; single level, shelf layout. (3 rail and dual track main).

I have been struggling to put ideas down on paper .... mental block?

I would like to feature modeling the WM from Cumberland to Elkins: loosely based.  Elkins would be the largest portion, featuring shops, RH, station.

I desire to have a massive coal mine, too.

Does anyone model the Wild Mary that would consider sharing advice & info on layout design, etc??????

Also, a few years ago the WM Historical Society released photocopies of blue print drawings featuring a Pacific K-2, heavyweight WM passenger car, caboose & lineside buildings.  I last saw them at the 2 Rail show in Strasburg last month but the seller was not at his table when I was there.

Thank you all for your consideration and time.

—John