I don't at all mean to come across as rude, but in a subject area like that, you will have very few students, and so you will have far fewer assignments to mark. You should work out how long it takes (40 mins max would be my suggestion - get ruthless with this). So even with 20 students per module, doing all the marking for 10 modules would take 130 hours.
I come from a discipling with 350 students per module, so we have many, many more scripts to mark (usually 150-200 each across the academic year), but we also have 12-20 UG and/or MSc dissertations each to mark, which will be way, way more than the numbers you will have in a creative discipline.
So even with the increased teaching that you have, your teaching, admin and marking hours will not be very different from mine (do correct me if I'm wrong, and you are leading 10 modules with 300 students on each of them).
Again, I am not trying to be difficult, but I come across a (huge) number of colleagues from all disciplines who start out with, "but I couldn't possibly, I have uniquely so much more workload than anyone else, there are no solutions". In - genuinely - every case, it is organisation and management. Try breaking your tasks down and planning them out. I can do it, so can you.