I think if you are going into six figure debt an Ivy League is worth it. The problem is the six figure debt for attending some generic liberal arts college.
Harvard, Yale and Princeton fund 100% of financial need with grants. The other Ivies, Stanford, Cal Tech and MIT provide grants for the large majority of need, with modest amount of loans and work study making up the difference. Moreover, all of them use an exceptionally generous formula for calculating need. A student from a family with an income under $150,000 will pay less out of pocket or by loans than at virtually any public or less-well-endowed private school.