As I see it, SRHC haven't had any of their locomotives hired out between the end of March and the end of July. If they were relying on this side of their business to provide the majority of their income, they would be in serious trouble.
On the other hand, during that time, they have run quite a few tours, including but not limited to, several Cruise Express shuttles on both BG & SG, numerous Royal Train tours out of Castlemaine and a tour to Echuca via Toolamba.
It doesn't seem to me that they are heavily relying on hiring out their locos at the moment, but that doesn't mean they shouldn't hire them out when the option is there.