Great game so far.
Suggestion 1 - Storage for parts and finished items. (As suggested before).
Suggestion 2 - That customers may ask weapons based on a budget. Something like "I want a great sword, and I just have a $50". That way you will be forced to use different materials, not just the most expensive you can afford.
Suggestion 3 - An option to turn customers away... "shooo, leave now".
Suggestion 4 - Some customers (a small percentage) may say something different like "Give me a hardy great sword, cuz I need to fight a dragon", "Need some protection, gimme a dagger"