Easy Cash
Did this at the Clocktower in Tairon, but I'm sure it should work at any store. Simply go up the set of stairs marked by the blue border, and take care of the three enemies in the stairway. Now, go back down the stairs and return back up to kill the same three guys again. Collect the loot or health and repeat as desired! I found that if you use the Nunchaku, you can score around 30 or 40 hit combos, giving you up to 1,000 cash points at a time.