Visa to Hong kong or form paperwork for Customs in HK (anything at all required?)

1. yes, you don't need a visa to Hong Kong. Please show your valid passport and the round-trip flight tickets when you pass the immigration in Hong Kong. Generally speaking, Australians are not checked the financial certificate

2. it is easier to obtain visa for Shenzhen in Hong Kong from hotel. The fee is almost same. In Australia, you need to pay the service fee of CVASC besides the visa fee. In Hong Kong, you need to pay the service fee of the hotel besides the visa fee.