I would suggest you speak to some logistics companies in Australia and pass on this
info to them, along with the size dimensions and weight, etc of the boat and trailer. They should be able to guide you and provide you with a quote on getting
this arranged. Alternatively, you could ask your "supplier" in Hong Kong to work out
a cost to get the boat down to Brisbane and take it from there.
Either way, it helps to check and compare the offers before proceeding !