One of our flight attendant friends lives in Discovery bay, her rent was $6,500 owner direct, for a 1 bedroom sub 500 FT 8th floor apartment with sea and green views from all windows.
If you work in Central, Discovery bay might be a bit of a conveniant sea change for you, especially as the ferry is quite a fast commute. It is possible to get affordable 1 bedroom places, although older, are actually quite good inside, ie tastefully renovated inc a functional kitchen. Bright and light.
I can only tell you what I have experienced , as we don't live there, but visited friends who do, its a very very pleasant environment providing you like hanging outside during your non working hours, with the gang at Jaspa's or whatever outside watering hole suits you.
Disco bay still represents good value for money especially during the weekends having so many leisure activities within arms reach.