It depends what sort of room you plan to stay and whether you are having a C-section? Their packages start from just over $10k for a 6-ppl room (3-day normal) to over $35k for a private room (5-day C).
This is the link to their price table http://www.canossahospital.org.hk/eng/eng_packages.htm
I have given birth twice there now by C-section and had Dr Eric Lee both times. His clinic is in Princes Building. He is very experienced and very smooth, but his prices are Central prices (i.e. not cheap)...