@ Septerra
I'm also looking at these two locations for glider training, so I'd be curious to know how you go and which one you choose.
I wasn't able to find many other locations around Melbourne, but gliding is certainly going to be the way to go for me given a tight budget.
I just found http://www.lilydaleairport.com.au/ which has a section on gliding, the page looks pretty out of date though so I'm not sure if the prices are current etc.
Let me know how you go.
Cheers,
Anthony