Anyway, I made this fairly simple loan projection using both the financial packages I received from Columbia and Harvard and the information from their websites. I assume 4% increase in tuition and cost of living each year, and I assume loan and grant eligibility remain constant all three years. (Meaning that any increase in tuition and cost of living goes directly to the higher interest GradPLUS loans). In addition, the calculations assume that the loans are given as a lump sum at the beginning of the year because I was too lazy to stagger the distribution by 5 months. This means that these estimates are probably 1-2% higher than they should be.
Here is a screenshot of the spreadsheet:

Here is a link to the spreadsheet in case you want to edit it:
http://www.filedropper.com/lawschoolcos ... rojections
I hope this can help other TLSers make wise financial decisions. I'm currently graduating from undergrad with 0 debt, and I admit I'm frightened to see these numbers.