DIY three year BA/BS degrees already exist, but they take careful planning through high school (to accumulate enough useful AP or college credit and choose a university that usefully accepts them) and college (to plan schedules carefully enough), as well as being reasonably decided on a college major before college entrance. Or being reasonably decided on a college major before entrance and taking carefully planned overload schedules (averaging 20 instead of 15 credits per semester) at a college that does not discourage students from graduating early.
NewU ( https://newu.university/ ) has only five majors, psychology and four types of apparently business majors. It does not appear to have a course catalog or list of major and graduation requirements on its web site. List price tuition and fees is $6,500 per academic year. It does not offer campus housing, so any costs of such depend on what off-campus housing the student chooses.
