If you think college is expensive now, just wait until it’s free...
But I am sure you would be able to keep your college.
No kidding. The colleges will know how to do this. Keep tuition relatively low, so those getting it for free are getting less for free. Then boost Room and Board, Activities Fees, Lab Fees, Registration Fees,......... Have the "free" part be lecture halls with hundreds of "students" with options like classroom education extra.
This will turn public colleges and universities into cesspools. Any attempts to keep up standards will be met with whining about "diversity". Freshman classes will be total zoos, filled with students hanging out because it's free. Free means there's no need to get high enough grades to maintain scholarships, etc.
Besides all that, it will increase the problem that we're becoming a nation of perpetual children. Young adults will be able to hang around and accomplish nothing for a few more years.