i think you got to realize that hkd15k can only get you about 400sqft net (half a 3 room flat in Singapore) and it will be an old apartment, unfurnished.... most singles are paying about hkd12-15k for a 1bedroom/studio....the bedroom is deceptively small....checkout gohome or centadata for a reality check
most ppl in hk get accomodation allowance of at least hkd25k so it will be hard to get by on hkd45k.