They did something similar with the "+Ulfberht". Quite interesting. Unless this man means to basically search for the materials, mine it, use a time correct forge and tools. While doing all of this in a replica workshop of the time. But you should watch the "+Ulfberht" documentary. It was very fascinating. Built the sword they way they would have done it. Proving that the sword was highly advanced. They metal(steel) used was almost just as pure as todays.