HK CAD exams and type specific groundschool roughly one month. Simulators, roughly one month. Emergency training and various blundering around, perhaps 2 weeks. 10 sectors of flying for SO training, 2 months. Add a padding of another 2 weeks because it’s aviation = around 5 ½ months after stepping through the door.
Just a comment of living in the Headland whilst I'm at it... IMHO 6 months in the Headland would drive many people to cirrhosis, and it’s a really expensive option if you are going to be HK based. It costs HK$500 per day to stay there (aka your entire allowance), naturally you’ll have to buy all your food on top of that. You can rent a furnished apartment anywhere in Tung Chung on a 6 month lease for HK$7,000 per month, giving you HK$7,000 in change from your SO’s accommodation allowance. Commuting from Tung Chung is < 30 mins each way, and costs < HK$10 for the round trip. It does mean you have to make your own bed tho’!