Ted,
The newest property is at the opposite side from the public "front end" of the Museum.
As for extending the narrow gauge, the concepts have been to 1) extend track north 2) install a track south from the turntable lead and install a station site with passing siding opposite the display building. When will it happen? When there is motivation. Without an operating locomotive and other reasons for extending track it will be slow in coming. The idea of a station and passing siding would create a display and interpretation scene that could have multiple uses. The extension north will probably come after some of the existing standard gauge yard is (re)moved.
As mentioned recently in another thread, there is a slow, but on-going, program to restore the Emma to operating condition.
An operating narrow gauge steam engine would probably be used during special events, etc. as there is no suitable passenger carrying equipment available.
For preservation and conservation the 1881 Barney & Smith coach will not be used for rides; except very special times. The Rio Grande cars were obtained for utility purposes with the thought of using the hardware to create passenger carrying cars; however the various restoration work of these cars has foreclosed that option.
OERM once made overtures for another locomotive that would have better served providing rides than the Emma. But this did not come to fruition. The locomotive moved east.
Brian Norden