@ 17K HKD, you'll be comfortable and find suitable accomodation in HK - esp for a single person. I'd not worry about it.
From what mental math I can do - I think your total cash compensation is split 70/30 basic/commission. That is quite normal. Make sure you don't have a commission cap (infact your commission %age should be tiered to compensate you for beating quota).
I don't see major problems with the numbers, as long as you can keep day to day costs down.