I don't quite follow your comment about what rollingstock stays/goes pleasing people. Is there some disagreement over what the SRHC maintains/keeps?Oh, to be blessed with such innocence...
Read here, if you dare: https://www.railpage.com.au/f-t11365080-0-asc-s0.htm (just read the pinned post, it isn't really necessary to read the rest of it if you only have a passing interest)
As for Albury being a tour destination, that would require an operational SG heritage set (which, to my knowledge, does not exist in Victoria).Steamrail Victoria has a set of SG cars at Dimboola (ex-SAR K carriages). ARHS Canberra has a Southern Aurora set that travels south of the border every now and then.
Gauge-converting SRHC's Spirit of Progress set wouldn't be free, but as I've outlined previously there are plenty of good reasons for SRHC to justify Government funding for such a project.