McDonalds
Did you know that most new SO's have to subsidise their rent by as much as half? After rent & tax you will have little more than $400AUD a week to live on. That's just over $50 a day to cover your food, insurance, domestic / household bills, travel costs, health cover, internet / TV, & social life. That's assuming you have no kids, no wife, no car, no hobbies, don't drink & never have a holiday.
You will NEVER own your own place in HK & the hours you accumulate as an SO are totally worthless at any other airline in the world.
I hate to say it but joining CX these days really is a terrible option for anyone! Buy working 40hrs a week at McDonalds with a half day on the weekends will get paid more, plus you can generally eat the time expired food when you are hungry. You still get to wear a uniform & a hat, but they are just a different colour. As a bonus, McDonalds wont put you in the sim every three months !