If you mindread Willy, you would have found that he is a scam artist. You can get your money back much later in the game.
Have you met him 3 times yet? If you give him gold to build a house he will try for more for permits and building materials, but I don't know if there are any more options if you 'buy' Folo's house and talk to Rose, then meet Willy again... I might have to try that my next game.
