Well you CAN make a career out of weaponsmithing, but from what I hear it takes a lot of time and dedication to get to the point where you can make any good money off of it. There is at least one professional weaponsmith that browses this forum and I am sure he will give you some imput. If you want more advice from industry professionals, go over to
www.swordforum.com and they can help you find the information you need to get started.