So how can a bachelor's degree be so cheap? Let's see what you are NOT paying for: libraries, labs, a football team, student health services, office appointments with professors, class time, clubs, a pretty campus with ivy covered buildings, dorm food, a counseling service, a placement service, an alumni organization ... a long list.
What are you buying? A program of readings and papers. A set of examinations in which you can show what you have learned. A final degree to demonstrate your mastery of the subject to the world.
Are you ready for that kind of focus and simplicity?