Only 100? One word my good friend - Skyrim. Just to level up till next perk. But I can't insist on 100 per day, he is just apprentice, new to profession. Baby steps first and then we can talk about numbers ;)
Although it would be interesting if my apprentice was young lass... kinda fresh to break the cliche of forging being only man's job, plus it would surprise others.
"Wait, you are blacksmith?"
"Aye, why, you don't think I can do it because I am a girl?"
Try answering that and leaving with fingers intact!