With the RAF rewards you have no risk as the first two months are effectively free.
I pay for both of my accounts using tokens and find that I have no trouble keeping up. Once you hit a certain number of auctions this will save you a ton of time as you can repost and collect mailboxes on one account while you are playing the game on the other. A second WoW account is one of the best investments you can make to streamline your gold-making operation.
