Life is full of surprise :) we booked the air ticket 2 days before the departure and stayed at a very clean and nice location dorm!!!!
1. Promotion Sale with Dragon Air: $375 (normal price is $550)
2. Dorm is $50
3. Food ranks from $5-$30 per person
4. Entrance fee from $5-$10 per person
For 3 nights in Hong Kong budget is $600 (but this doesn't include shopping :)