Well yeah if you have someone giving you the materials, but at end game when you need some extremely rare stuff (Arcanite, gemstones, etc) you're gonna be hurting for it. And I take in about 30g or more a day so it's not a big deal to buy stuff.
BTW what armor are you making that you make 10g from it?
I want to add that for anyone considering a warrior, do not pay attention to all the complaining on the WoW forums. It's all a load of crap, warriors work fine and they're a blast to play. As a matter of fact, the same goes for any other class. So yeah, ignore all the whining on those forums, it's horrible.