In Kakariko Village, after you have the ability to change into a wolf whenever desired, and after you can make bomb arrows, turn into a wolf and jump on top of the big building with the giant bell on top. Shoot the bell with a Bomb Arrow to get a Silver Rupee (worth 200 Rupees).

After you have filled your third Vessel Of Light and are again in human form, go to the Howling Stone high up on the cliff by Lake Hylia (the one you could not reach as a wolf). Behind it is a bombable wall leading into a cave. Bomb the wall and go in. Make sure you have plenty of Bombs and Lantern Oil. Bomb the walls all around the cave to find enough Rupees to fill your wallet.