I am flying in from Singapore and needs to be in Dongguan bus terminal by 6pm on Friday.

The bus terminal is located behind of Asian Capital Hotel.

May I have your professional advice on
-Shall I fly into Guangzhou or Shenzhen or HK?
-Shall I take a bus or ferry or Train from your recommended place?
-Is there bus terminal number where I can catch the bus?
-Shall I pre-purchase ticket or it wold be plenty of busses around?
-How much does it costs?

Thank you very much in advance for your kind reply!