Regarding the 15k usd instructing..
I lived with an EFT instructor when I was there. (I was instructing at Ariben), and he made more than 15k a year.
He was there instructing for 7 months, and I think he made around 700-1200 usd every two weeks.
I even think they now have a base salary, on top of the increased hourly pay.
Was told this by another former roommate of mine, who works there now.