Electro you will find that most credit cards have rules around the maximum of cash advance you can do at anytime plus an additional fee. $1000 is common for the maximum amount and ~2% for a fee, but obviously check with your card provider.
Makes withdrawing say $15000, a 2 week ordeal!
Just reading up on this with my Macquarie VISA (I'm looking at alternate ways for a deposit!) - you can take your card into any Bank that accepts Visa and withdraw a maximum of $5000 out over the counter. Just need to provide photo ID.
YMMV.