If you have the A voucher and the B Voucher then you can make loads of money once Edward joins your party. Just buy loads of Sheep Hide Material and get him to keep making Smiley charms once you unlock them. Just make whatever you can to unlock them and then keep making them and selling them. Sheep hide cost 120 each and Smiley charms sell for 1500 since you only need 2 sheep hide materials to make them you make loads of money in no time. This also levels up your silversmith skill which will eventually unlock 2 achievements.