I am in similiar situation but not sure whether or not I will stay in HK. I will prepare almost the same thing as other moms-to-be do because they are necessary. I will buy lesser furniture, bulky things and toys which are not urgent. I prepare the stuff for the new born baby and my own use only.
I won't buy "BB car" and high chair. These are not urgent thing. I choose it later on or just buy one overseas, depending on the price and design.
If you drive overseas, you should buy a baby car seat overseas. Or consider buying a "universal" baby car seat which you can carry your baby yourself, be installed onto a
"BB car" and/or be installed into your own car.