If you aren't going to get all of them, don't play the job. My advice would be to level BLU(saw that you were posting in their forum yesterday) or some other job like that, get it some decent gear, and farm dynamis or something. Best option for that would probably be BST to 99 and DNC to 49. If you are having a hard time affording heads and frames then you won't like how much attachments are going to cost you.
Ya know, you're really similiar to me, whether you like that or not :p, but you need a catgirl display picture.