While it would be wonderful to see a NG train running between Lavers Hill and Beech Forest, I doubt the necessary vaults of cash would be available, nor is there a nearby source of huge numbers of volunteers. Perhaps it would be better to devote limited rail preservation resources to extending existing preservation operations that stop in the middle of nowhere to their logical terminuses. So perhaps better priorities would be to:

* Extend the Daylesford line to it's (long term) logical terminus at Trentham.
* Extend the Walhalla line to it's (long term) logical terminus at Erica.
* Develop a decent, professionally curated, mostly indoor rail museum at a site with adequate space.
* Work on giving the South Gippsland line the resources it needs to become a slicker, more commercial operation.

Even these projects would consume decades of the limited cash and volunteer resources available. Sadly I don't think we're anywhere near ready for a whole new restored line yet.