Just from experience... Sometimes it is very difficult to live on your own while going to school. I am not talking about living in a dorm, but fully move out.

School is expensive no matter where you go, and you can save a lot of money just by living at home. If he moves out, he will suddenly have lots of bills to pay all on his own, and he may even have to take out regular loans just to pay for his new apartment and related expenses (utilities, food, cooking products, cleaning products, shower curtain, etc.). I would explain that to him.

It is not impossible to live on your own and go to school at the same time, but given the exorbitant costs of going to school, I personally don't think the freedom of living living on your own is worth it if you are in good standing with your parents. (Some kids just hate or dislike their parents, though, and want to be as far away from them as possible because they are bad influences, abusers, etc.. But again, if you have a good relationship with your parents, I would advise against it. I doubt he would regret living at home once he sees how much money he can save. And don't forget that sometimes kids who move out end up going back to their parents' house for financial reasons.)