OP if you wish to PM then feel free to do so and I can talk a little more about the experience I went though. I have worked in the migration industry but no longer do so and therefore don't have a need to trawl for business on this forum. You probably don't need a RMA given your level of experience and would save yourself 1000's. The one hurdle you do face is a positive skills assessment which is a simple matter.
If you have a legal role at the moment then it would not be wise, as advised above to quit, go to a foreign country to complete admission requirement and then hope to get a job. The opportunity cost would be substantial and Australia can be a very expensive place to live.