...it appears that most (all?) of the Lv1-15 Tradecraft Leves are pure profit, even if you buy the ingredients from the guild supplier.
I've done Blacksmithing and Carpentry this way (starting from Lv5 going up to 15), and I've taken a quick look at Armorsmithing (Armorcrafting? I can never remember what that class is called) and it looks to be much the same.
At Lv15 tho, is when that changes; you can still do Lv10 leves but the XP isn't all that great. Carpentry in particular is awesome, as the Levemete, The Turn-in and the Guild Supplier are within Sprint distance of each other. It took <1hr for me to do CRP 5->15 on said leves.
This burns through the Levequest allowances fairly quickly, but IMO it kinda beats grinding it up the old hard way and if it is pure profit, why not? Every 2-3 Leves earns about 200G in profit. Not much to write home about, but the XP is nice.
Just thought that was interesting that they give you a ton of "Free" levelups.
Edited, Mar 19th 2014 12:57pm by Lyrailis