How much does hagwon cost?

I'm curious to know, how much does attending a hagwon, or a private tutoring academy, typically cost? Are the fees dependent on the subjects being taught, the reputation of the hagwon, or perhaps the duration of the classes? Are there any hidden costs or additional expenses that one should be aware of when considering enrolling in a hagwon? Additionally, are there any financial aid options or scholarships available to help offset the cost for those who may find it difficult to afford?