French Castle in Bordeaux or an inner Sydney 3 bed house?

$1.5 million to get a Sydney 3 bed house or a French castle in Bordeaux, is an interesting comparison. 
These days, a penthouse or a 3 bed house, in global financial hubs like Sydney, Singapore, Shanghai, New York, Hong Kong or London, cost more than a castle in country Europe. 

It would be equally interesting to find the maintenance costs and net yields from such a castle as an investment property.

Read a list of castles available for below $ 1.5 million at    http://goo.gl/SVgGyJ