I transferred from Com/Arts to just Com, so I think I can answer your question.
If you're smart, you can easily smash your entire timetable (4 subjects) into two days per week. In your first year, that is. But the subsequent years don't change all that much (depends on what majors you do though), so if you're looking to go to uni for only 2-3 days a week until the end of your degree, well... should be all good.