From what I've heard from other 375 blacksmithers it's more hassle than it's worth so I wouldn't bother going down that road.

Most people will say mining and skinning / herbalism are the best money makers but in terms of saving money / time trying to find someone to craft your consumables I find herbalism and alchemy to be a good mixture of income and useability (cant think of the word I was looking for) in terms of making flasks / elixirs for raids.