Which is the cheapest and fastest way to Hong Kong from Shen Zhen?

It will be very expensive to hire a van from Shenzhen Airport to Hong Kong directly.

1. when you arrive Shenzhen Airport, you could take a coach departing to Kowloon, HK directly. The bus fare is CNY90/adult and takes 1.5 hours on the way. When you arrive in Kowloon, you could hire two cabs driving to the hotel directly.
2. at Shenzhen Airport, please take the shuttle bus Line 1 to Shenzhen Railway Station. The bus costs you CNY20/adult and takes one hour. Then, you have to go through the Luohu Port to enter into Hong Kong just right here. Finally, you could take the train here to arrive in East Tsim Sha Tsui station in one hour with a fare of HKD36.5/adult. Out from the Exit P2, you could walk to the hotel in 5 minutes.