I worked throughout school and went to CC/state school so it was cheap for me (if I did it in four years, it would have cost me 17kish all in for my mechE degree). I paid most of my loan off during that time. I graduated with like 3k left over and no real intention of paying it off until after I buy a house (it’s my longest held line of credit and is likely doing more for my credit history than the handful of dollars it costs me in interest)

Using CA as an example (because worst case). That 70k turns into 50k after taxes with no deductions.

Assuming you had no living costs (be it parents or whatever), reasonable health insurance premiums through your employer, minimal transport overhead costs (call it an old civic you owe no money on and have liability only for), are super frugal on food, and spend literally no money on anything else, I bet you could knock 20-30k out in a year and half or so. It wouldn’t be fun. But I bet you could pull it off. Dave Ramsey would probably make you a prophet if you did it.