For one semester, pick the location!
It is very difficult (but not impossible, just $$) to rent a car at your age.
I don't know that many US policies allow shared driving at all among young drivers, my take is that anyone who states "because US car insurance policies allow anyone to drive with the owner's permission" has never looked over their recent insurance policy re young drivers. Our insurance does not allow a random young driver to drive our vehicles. One discussion we have is that shared driving is a potential insurance nightmare. I advise my kids to not take such blanket statements as factual, because in reality the people that will be sued for that non insured event will the parents of the non insured driver.