Aye, lots of work! I had a coworker recently approach me and ask if I could sew 40 patches onto 20 long-sleeve uniform shirts for some club he's in. I immediately said, "Nooooooooo"!
It would be way too much annoying work to try to sew 40 patches onto the sleeves - I'm not even sure how I'd do that without opening the sleeves up. Nope, nope, nope, not a job for me!