My dad is giving me the ultimatum

I’m just pondering reasons for your Dad to be upset. He probably really, truly wants what he thinks is best for you. And he does have significantly more life experience. He would also be concerned about the cost and the value. And time is getting close, so that can bring on a bit of a panic factor. Try to see things through his eyes in order to be respectful in your conversation with him. Listen to him as much as you want him to listen to you. This IS a very important decision, and your relationship is important, too. Try to be calm and methodical and maybe sit down and write out the reasons each of you has for and against each college. Best of luck for a good future and both a happy life and a happy family relationship.