With the first boss dead, I went over to the pool near my house and chucked pretty much all my rupees in. This made the pool rise into the air, as a tower, and the bloke-in-a-nappy reappeared – now in a suit. Hmm. Get the impression he’s making you work for him?
The tower allowed me to access the next area (or continent, as the game calls it, although they’re a bit small for that, I’d say). I wandered round there for a bit, hired another bodyguard, and beat some baddies up with him. I’m out of money (well, almost) now, so can’t do anything else until I do some cooking and selling.