hi Tree, if you are successful with RIS, you don't have to pay any fees - after one year's training, you will get QTS status, after the 2nd year, NQTS, and you can extend a third year. I am also looking at this, I really need stability in my life right now.
If you go through Teach first, it is one year's training and depending on which hosting institution, you could even do a PGCE, but they will ask you to pay something.
love satchi