I like this idea. I used to play like this a while ago, where I had to reach certain milestones before I could make a new teir of item or whatever. Made the game much more fulfilling in my opinion.
I feel like you could implement it into the new recipe book system quite well, too.
I just took a look at the events in Forge, and this is definitely possible. I might look into making it, cause it'd be fun to play.
If I do anything on it, I'll be sure to link it here.