Coffin Corner,
a q400 fo annual salary is 55,200. Remember, income tax in Australia is extremely high. Expect to pay about 35% of this in tax, correct me if I'm wrong!
For you to put the time into converting from the JAA to the ATPL, it would be quite a process.
Many here in Aus are doing the reverse and it takes months and months to resit the exams and a very costly exercise...perhaps over $10,000 Aus.
For someone in Europe to come to Australia, move at their own expense and earn significantly less after tax and convert their licence, you must really want to live in Aus then.
You are welcome, but I can assure you that it's not so much brighter here!