I am quite curious as to why you would choose such a course of action.

There are more yachts in Aus than there are people to sail them.

What is the yacht you just sold (if you have sold it) and what is your definition of "a more suitable liveaboard"??

There is an article in the current "Cruising Helmsman" that is about what you are proposing. Might be worth a read.

Also don't forget that you will be assesed at 5% duty on the import value of the boat and then 10% GST on top of that. The value of the boat is not necessarily the purchase price but its landed value in Aus. which may be substantially more. Don't even think about trying to deflate the value for customs purposes. Customs have even more power than the ATO over non compliance.

yeah gotta say that id pay a bit more locally.
remember they are slow to sell but fast to buy. bargain the price down over a longer period of time and save heaps.