sometimes therapists have sliding scales (where they will see you for reduced rates if you really can't afford to pay more). depends on the therapist though. if they work for some kind of agency they might not be able to do that. or if they don't have enough full fee paying clients they might not be in the financial position to do that.

30 visits a year isn't very many :-(

could you ask your therapist if there is any way you could see them more?