U.S finance for Oz property?

There are Aussie banks in Japan that lend for Australian properties in Japanese yen -with various conditions. NAB do it and ANZ too I believe. So it is likely USA branches of the Aussie banks will do the same.

yea, asia is pretty easy to do that. Note sure about the US.

I have looked into this. 

The requirement of NAB or ANZ is that you must be a tax resident and earning an income in the offshore jurisdiction (ie Japan or USA) where the mortgage is taken out.  I am not aware of any financiers that will allow you to take out a multicurrency mortgage (ie a loan denominated in USD and using a US rate of interest but secured against an Australian property) if you are an Australian tax resident. 

Things can get a bit scary pretty fast if the Australian dollar declines.  The lenders require you to maintain a minimum LVR of 25% and recommend an initial deposit of 30%.  So if the Aussie dollar drops by 10% and you are on the wrong side of your LVR you will face a margin call for the difference (ie 5% of your property value).  A 20% drop would be a 15% margin call.   So this is not a product for the faint hearted and you have to be pretty confident about Australian inflation remaining a threat to prop up interest rates and therefore supporting the dollar. 

All that being said you can get some pretty amazing rates offshore.  I would be interested in talking to anyone that has been able to work a way through the tax residency issue – because if you use a foreign national to hold the property you will never get through the Foreign Investment Review Board.