If you are on an established server (not one that says "new") i would recomend another gathering proffesion as the second one. Sure, you can make your own armor with skinning + leatherworking, but with the money you just made you can buy better armor than you can make. The only time it is worth taking leatherworking (or another crafting proffesion) is either on a new server, since there is a huge lack of armor with everyone needing it, and later on in the game, past 40.
Plus, with skinning, you can give your mats to a LW and he can make those blues for you, and you will still have the money to buy that other gear you saw on the AH.