With 0% interest loans (lots are available for students), 10k tuition + 10k a year in living sounds pretty reasonable considering that college graduates make about 98% more per hour [1] on average than those with only high school diplomas. Not to mention that if you're doing something in CS, you could pretty easily pay off each year by doing extra work on the side / through summer internships.

[1] http://www.nytimes.com/2014/05/27/upshot/is-college-worth-it...