Hi Kate,
We applied for the 143 in May 2010, our son and d-i-l had moved to Brisbane in February 2009, our case officer was allocated in July 2011 at which point we were asked to provide evidence that they were settled before they would proceed with our application, we emailed the following documents to our case officer: Contracts of Employment for son & d-i-l, House purchase, Mortgage statement, Car purchase, Mobile phone contracts, and birth certificate for our grandson who was born in June 2011. Our visa was granted in November 2011.
Sue