Southpac I understand there are already rules setting out on what is to happen if two officers use the same dwelling and if they were unsure did they ask the simple question to the housing department. If something sounds too good then it normally is.
As for buying it is like everything research the market in Hong Kong then do the maths and like everywhere when you first buy a house there is normally something that has to give for a short period of time but considering the levels are still not back to where they were previously then there is a fair chance there is still a way to go before it slows down.
Good Luck if you decide to buy and remember it is high up on the stress level gage so do it after you have the initial courses out of the way