Does Singapore need visa to go Shenzhen & Macau for about 3 days at each city?

Read that there is Mainland Coach Service from Hong Kong International Airport to Shenzhen Bay Port, where is Shenzhen Bay Port? How much & how long the journey?

Please advise how long & how much (Taxi fares & bus fares - advise bus number please)for the journey from Shenzhen Bay Port to the following hotels : -

1. Best Western Shenzhen Felicity Hotel, 1085 Heping Road, Shenzhen
2. The Panglin Hotel Shenzhen, 2002 Jiabi Road Lowu Shenzhen
3. Pavilion Hotel Shenzhen, 4002 Huaqiang Road North Futian, Shenzhen
4. Shenzhen Shangriu-La Hotel, East of Railway Station, Jianshe Road, Shenzhen?

How long the journey & how much (Taxi fares & bus fares - advise bus number please) from the abovementioned hotels to Window of the World?

Heard we can take bus from Shenzhen to Macau, which of the abovementioned hotels has the shortest journey to Macau. How much & how long (Taxi fares & bus fares - advise bus number please)?

Is there train service to Macau from Shenzhen? Which of the abovementioned hotels has the shortest journey to Macau. How much & how long (ferry service)?

Where is the nearest train station that I can take to Kowloon (Hong Kong) from the abovementioned hotels? How much & how long?

Please advise.

Tks & best rgds