If you’re worried about cost, fly more often. It’s counter intuitive but if you fly more often you’ll spend less time each lesson reviewing what you did the last time and more time building skills and learning new material.
If you have any more specific questions, feel free to Freepmail me.
PS: PPL (Working on CPL) and Glider Instructor (Canadian)
Cheers!
If you are too worried about the cost you need to do something else. I have not found a cheap way to fly. Other than jumping out of a tree.