Is that price just for a GCSE?
If you have a local college it would be well worth you speaking to them, my local college offers evening classes for half that price and its only 2-3 hours one night a week. They also offer distance learning which is around the same price where you study at home and have the support of a tutor by tel or email.
I don't know about help with paying as both DH and I work so we have to pay if we want to study.
Good for you, Good Luck
Cx