Is there any reason to not refianance my student loans once I graduate?

How long does it take to pay off 60000 in student loans?

The extended repayment plan gives borrowers up to 30 years to repay their loans in full, depending on the amount owed. Payments under this plan are generally lower than those under Graduated or Standard repayment.
Extended repayment.

Loan balance	Repayment term
$40,000 to $59,999	25 years
$60,000 or more	30 years

What is the maximum amount of student loans for graduate school?

$138,500

Undergraduates can borrow up to $12,500 annually and $57,500 total in federal student loans. Graduate students can borrow up to $20,500 annually and $138,500 total.