Why do flight schools refuse to tell me the price of a course?
Mostly because what takes one individual 50 hours, will take another 75, and someone else 100.
For that reason, most if not all flight schools will only tell you 2 things

The minimum number of hours required to get the certification you're after (PPL, Night Rating, Instrument Rating etc).
The cost per hour of instruction, and the cost per hour of the various aircraft they use.

While we're on the subject, I should add that you should be wary of putting down a large upfront cost to any school. I have heard too many stories of flight schools going insolvent and students losing their money. Often you will see a discount for &quot;block bookings&quot; - if you can afford it pay just as you go, and if you do decide to upfront a block booking only spend what you could stomach losing.