In some ways I like it, in some ways I don't.
On one hand, this will be very good for roleplay. It encourages trade between players and keeps anyone from ever getting too rich. It gives value to items.
On the other hand, it's very bad for roleplay. It requires people to sit in an incredibly ugly room surrounding by a bunch of crafting stations stacked on top of each other for hours at a time. They can't leave, they can't stand there and go do something else irl while they wait, and generally people are going to get bored very quickly if things continue like this. Not to mention that the increased value of items as mentioned before is going to increase the amount of "items or die!!" roleplay than ever before.
Also, in the future, it's a good idea to make sure a plugin works before releasing it to the general public.
All of that said, it's a good plugin, and has great potential, it just needs some editing. All I have to say is thank Iblees you didn't release the plugin in it's current state at the start of 4.0 instead of in a temp map.