Capt, I think jungly may have been refering to the change in SO allowance after 2 years, to what it should be from year 1 (the same as all other aircrew)
As for jungly's helpful link to HKHOMES, and reference to stanley being inside the SO budget... I just had a look at the rental page for Stanley. Prices range from 35,000-150,000. So NO, you can't rent in stanley on an SO budget.
In the New territories you may be able to pick up a stand alone house, ok view, with a garden, and somewhere to park the car, for around 30,000.
As for a car. Work on $HK2/km (Half of that is petrol $11/lt) Yes thats right $AUD2.5/lt