What is the best and cheapest way to go to Silka West Kowloon Hotel from Hong Kong Airport?

If your kids are small and you have many luggages, I suggest you take a taxi for the sake of safety and it shall cost 220-240HKD. To save money, the public transportation can of course be considered. Find bus no. E21 near HKIA. Take it and get off at Ming Kei College, Cherry Street after 70-75min. Then your hotel is around 250yd away. In this way, you only need to pay 14HKD for yourself. Kids between 3 and 11 years old can enjoy 50% off and smaller kid can take bus for free.