My boy is 10 years old now and we think we should go back to HK after he completed his bachelor degree. Because it is very limited career opportunity in Australia and I don't want him to be a junior clerical worker for the rest of his life. As a native English speaker, I think he got more career opportunity in HK.
I don't know other child but my boy is very very lazy and he only spends 10 minutes(occasionally up to 20 minutes) a day on homework or study. He got sport either basketball or badminton everyday except Friday. He is Year 5 now but he is learning Year 9 Maths at home. It is obvious that all of us are so relax and don't need to worry about his study compared with the child in HK.
However, we need to be well prepared if we want to go back after 10 years. The key problem is we need to have somewhere to live in HK. I hope I can buy a small apartment in HK in next few years if the HK property market can drop to a more reasonable price.
My conclusion is "We come to Australia because of our child. We also go back because of them"