17% is huge, particularly when you consider it within the context of after tax income. $100k salary is $60k or so after taxes in California; take away $17k + rent and food, and you're getting pretty close to paycheck to paycheck living, particularly if the person has loans from a failed college attempt, medical expenses, etc.
They're essentially asking for $30-$60k or so - which is more than in state tuition for a bachelor's degree in many states. The difference is that a BSc is still widely recognized and accepted and will still be in 10 years (despite what many HNers would like to think), unlike this program, which most certainly won't even exist anymore.