Just be happy he isn't an Artificer from Eberrron...
All creation feats as class feats along with bonus feats? With Exceptional Artisan and Extraordinary Artisan taken four times each (beacause thier effects stack), you could, with only 8 actual feats, create any item with no gold cost and no time devotion...
Now, having done this, you have to work something out with him. My DM and I worked out somewhat of a burn-out rule where I could only create a certain number of items per day/week or I was subject to insanity from an overload of magical discharge.
Just remember, inventive solutions to simple problems can make the game more fun for all. Heck, you could have the Wizard's Guild demanding he close up shop, give them a cut, or leave before they have to take "desperate measures."