Have you run the numbers on IBR, PAYE, or PSLF? You're not really coming out ahead if you specialize. Assuming you're single and specialize in something with a $250k starting salary, the standard single deduction will put your AGI at $243,800. 150% of the federal poverty level for a single person is $17,235, making your monthly discretionary income $18,880/mo. Let's assume a $250k loan balance at an average of 6.8% interest.
IBR: 15% of your discretionary income for 25 years ==> $2832/mo
PAYE: 10% of your discretionary income for 20 years ==> $1888/mo
PSLF: $57k cap on forgiveness is still up in the air, so no point in even considering it right now.
With a standard 10 year payment plan, you will make 120 payments of $2877 for a total of $345k in payments.
With the projected IBR payments, you will make 123 payments of $2832 for a total of $347k in payments.
With the projected PAYE payments, you will make 246 payments of $1888 for a total of $463k in payments.
With IBR your loans will be paid off about 10 years into the 25 year period, so you will receive no forgiveness.
PAYE yields forgiveness at 240 payments so you will be ahead six payments ($11,328 plus interest, which will be treated as taxable income) at the cost of making additional payments that total about $120k.