I just had a look at them too and got a four figure amount and said yeah nah. My fault for leaving it so late as I didn't think I'd be able to register or get time off work. I've decided to 'commute' from Benalla.
I just called Jude at the High Country Caravan Park, she advised that they have some unpowered camp sites available.
If you don't mind camping, I think this would be preferrable to Benalla. You can call Jude on 0455 998 852.
Alternatively (if you haven't tried), Bonnie Doon or Merrijig would be better alternatives to Benalla.
Or, one of the local pubs, others have stayed at them.