It is doable but highly location based and still really tight. I’m in a tier 2 US city. Our interns wage would equate to $58k annually. A car isn’t needed if in the city. Most people have a roommate, which works out to just over $1k a person.

58 (pay) - 21 (tax) - 13 (rent) -13 (transit) leaves $900/month or $30/day.

Full time grads are around $20k higher….so roughly triple the amount left over.

Or you commute further. I’m mid career and commuted more than hour most of my career because it let me get a better/cheaper apartment while affording a used car.