Want free money? Of course you do. Start a new game and transfer all the money from one character to the other. Start a new game again using the character with all the gold, but give him a new partner. Move the 1,500 gold starting money from this new character back to the other one who should be still loaded up with the rest of the gold. Follow that? Good. Repeat the process until you have as much money as you need.
On a lighter note, when playing as the thief try robbing the chickens. Also, toss some coins in the bard's tray for a cute bonus.