Just go to the Gamestop, trade in some games, and use their 50% off coupon until September 15 to get the $37 game for pretty close to free (also comes with 30 days free access). The game is out in stores (but right now you would have to make a character on the Japan servers until you could transfer in 30 days). If you can't afford the $37 dollars for the game, what makes you think you will be able to swing the $13 per month to keep playing past 30 days?
Edited, Aug 29th 2013 4:24pm by Valkayree