I want to visit Hong Kong, Macau, and Guangzhou Tourist/visit L type

1. Usually, you need to pay 3,000 rupees for Macau; 3,000 rupees for HK; 3,200 rupees for Guangzhou.
2. Yes, you need to fill 3 forms for that.
3. It's possible for you to get get the result same time. But if your application will be transferred to HK or Macau immigration department, you cannot get that at the same time.
4. There is no exact requirement for how much you should provide. Usually, you should prepare at least USD100 per day, which can cover all your expenses.