To decide you need to ask yrself four basic questions:
-where from the Med are we talking about, Med is 2.000 nm wide.. and in winter months is more dangereous than any Ocean.
-what kind of risk you want to take
-what part of the Australia
are you planning to go , west or east ?
-what kind of crew do you have ?
If you want to do it style and are not in hurry, I would go through the Panama
channel, waiting for the appropriate seasons for each passage
. If you want to hit east Australia
that's even better.
If you want to take some risk and are not far west of the Med, you could try yr chance through the gulf af Aden (I wouldn't, but I have a friend who does it to Philippines
every year..) This is by the way the shortest route
, particularly for the west Australia.
The last option is the cape Horn. From thereon, the conditions probably will be on the limit of Belize
, you need a very strong team..
In any case the last two options are not the routes that you would like to do with yr wife and friends..
If none of the options are for you, plan to send yr boat by a ship. I see lot of boats being carried by ship from Malaysia
to Marmaris and the price
could be worth checking from Marmaris back to those destinations.