How do you get lots of rupees at in Windwaker?

Answer 1

The easiest way to do so is to go around the ocean, look for glowing areas, and use the Grappling Hook to hook up chests with 50 rupees in them. In addition, there are also some treasure charts you can get that lead to treasure chests with 200 rupees in them.

Answer 2

In the big city, you got to go to a house in the right corner of the map area, and catch a bug for the girl then she gives you a bigger wallet for 600 rupees.