For my warrior, i didn't bother to get Blacksmithing.
At later lvls, the price of collecting the materials is wayy higher than the actual price of a similiar equipment in AH.( Eh, just my opinion)

Just pick up Herbalism and Alchemy.
If you are in PvP server, herbs and potions are almost the best selling stuff in AH. With the implement of battlegrounds, these stuff are selling like hotcakes.

Another way of earning fast money is picking up 2 gathering skills.
Herbalism and Mining is great but minimap can only show one thing at a time. Just download a mod which memorizes all the herb and mining nodes location. (Eh, forgot the mods name...It was included in PC Gamer few months back)

With that amount of cash flowing in, i think buying from AH wouldn't be problem.
Just join any instances group, low lvl instances like WC,RFK, SM give out good warrior gears, help you lvl up fast and grind your skills for later lvls instances