Finding a place allowing dogs is a challenge in the city. You may wish to move further out if you also need space. Consider also your travel cost. Travel cost in HK is relatively cheaper than other large city in the world, but it can still add up. Discovery Bay and Clear Water Bay (Sai Kung) are popular places for expat, but the travel cost and daily commute can be quite discouraging. If you are in Rome do what the Romans do as they say, and try to really live in a cosmopolitan. The convenience and life style of this city is unique; try it out.