Regarding the accommodation costs that Stallone mentioned... that's the fly in the ointment.
I'm assuming an HKE F/O will make about 80k per month.
A decent flat (IMHO) for a family of four will cost about 40-50k per month unless you want to make your family suffer and end up divorced.
Do the maths. It's not THAT difficult. You're disposal income will be F all, and you'll NEVER get on the property ladder here.