Let's look at some numbers. Don't construe this as me being a dick, I just want to throw some numbers on the board (and avoid looking at UCC 2-314 for another 5 minutes

):

My 120k debt:ICR is the rate at which you are spending 15% of your income on loan repayment:

(also, I put in an interest rate of 8% because my loans are mixed between 6.8% and 9.~%)

10 year repayment schedule:

Monthly Loan Payment: $1,455.93

Minimum AGI (ICR)$98,186.00

25 year repayment schedule:

Monthly Loan Payment: $926.18

Minimum AGI (ICR) $66,401.00

Now let's say someone get themselves

200k into debt.

10 years:

Monthly Loan Payment: $2,426.55

ICR of $156,423.00

25 years:

Monthly Loan Payment: $1,543.63

ICR of $103,448.00

those are some large figure. the only flaw in the calculation is that the ICR (aka the minimum income need to avoid economic hardship). someone making 80k has much less hardship devoting 25% of his/her income to loan repayment than someone with an income of 50k would.

What I think all of this shows is that you either (a) need to keep your debt at or below 120k or (b) be confident that your expected income is above above like 80/90k. or be sure you want to do PI, because then non of these calculations really matter for you anyways.