First thing I would say is talk to your dm about the kind of campaign he wants to run. If it isnt going to be the sort with lots of downtime, a character who's focus is on crafting will be really lack luster. You need days if not weeks of free time to craft anything of worth. You also need to know how the dm feels about crafting items. May dms dont like the idea of the character or the party gaining major advantages via crafting (as you only need to spend half the wealth for whatever items you like) and may have an issue with this kind of character.
As for the character, a wizard can pretty easily be very good at crafting without a huge investment. You get scribe scroll at 1st level and get bonus feats that can be crafting feats every 5 levels. Make sure your intelligence is as high as you can get it and you will function just fine as the arcane caster of the group. Everything else for a wizard is spell selection, which doesnt interfere with crafting. Its actually pretty easy to do this.
Other Arcane options include: Bard [Magician], Sorcerer [Arcane bloodline] and also take a look at the Mastercraftman feat.
you can find plenty of options at: d20pfsrd.com
Have fun!