It is is always fun to dream what could have been.(But its also sad to realize what is gone)
Yes 42 was in Durango at the end but she could have easly been moved to ridgway.
A tourist railroad from Ridgway to Telluride on the former RGS would have been great. But I think a better and more scenic run would have been from Rico to Telluride. From Rico you could see almost all of the scenic wonders that made the RGS famous. IE Lizard Head, Trout lake, Ophir. You could have a lunch stop at Vance Junction, then passengers could take a goose into Telluride.
Or you could have an RGS tourist line like the C&TS. Have two trains leave in the morning, one from Rico and one from Ridgway and meet for lunch at Vance Junc, and have a goose meet them to take passengers to Telluride.