Oriana - these guys say $6,000 - $8,000 using a RMA, I don't know them but seems close to the mark.
https://migrateoz.com/index.php?opti...ask=view&id=45
$10,000 is more like an Australian citizen bringing in his foreign partner in on a Partner Visa without using an RMA, more like $15,000 if you use an RMA.
With the American taxation system - "can always go back" phrase rolls off the tongue a bit fast!