Crafting Basics

To craft anything, you first must find the materials.  These materials
can range from mundane to exceptionally hard to find.  After you have
assembled the items together, you then need time and the tools to craft
whatever it is that you want to make.  Most of the time, you can find
such a place in town and rent it for a fee, or if you are at home, you
can practice your craft there.

Different items take different amounts of time to create.  We are not
exactly going by the PHB, but rather a 'dramatic timescale' for item
creation.  Which means I'm going to be the one telling you how much
you've completed/etc.  Of course, the harder the item and less skill
you have, the harder it will be to complete.  And if you're not that
good, you might even screw up and ruin your materials.  If you keep at
it, though, you should do just fine.

Under most crafts, there's a listed market price in materials other
than those required (such as the cold iron for a suit of cold iron
full plate).  These are the costs for someone creating the items.  Most
artisans or craftsman will charge twice as much to compensate for their
service and time.  Families of caravaners usually don't charge for the
crafting of necessary equipment for their own members; they simply
charge the cost of base materials.  Caravaner families will usually
charge 150% the cost of base materials (that's 3/4ths for you math
majors) to craft an item.