Western Oz being on the Indian Ocean has a most pleasant climate, moderate Westerly breezes so that even when it is extremely hot you don't seem to notice as much. Wonderful beaches, and of course sailing out of Freemantle. You have already mentioned some familiarity with the wine growing region of the Margaret River which is now producing some World class vintages. I opened an office in Perth in 1996 and it has been a favorite destination ever since. There are a number of nice hotels along the Swan River as well as a casino if you have ideas about increasing your wealth.
One interesting industrially oriented thing to do is to visit a gold mine in the outback. There are several in the area.

Enjoy! bb