>>15111884Battle Chateau next to the Daycare.
Amulet Coin/Luck Incense (remember these two items don't stack btw) and Prize Money Power 3.
Turn off shift and battle animations so you can get the best out of those 3 minutes of prize power plus.
Over the course of a few battles you'll get at least 500,000 in an hour if you activate good writs and have a higher status in the chateau.