We recently shipped our 16 m yacht from the UK to Seattle
and it cost a bomb. You need to contact one of the yacht shipping
companies that has a route
going from NZ to OZ and see how it would work
for you. The sailings are infrequent and they may only take you to Sydney
or some other place than Brisbane
. Send an email
asking about their routes to Dockwise, Sevenstar or try the agents Peters and May.
And you will need to skip lunch for about 5 years to pay for it!