sorry to say this but i wouldnt go with the students if you are serious.
it depends how you want to operate. if you want local, hire someone local. if not, you can pretty much request what you want from the stores listed on the site. they will do it for you. but there is minimum order quantity for custom made/special order goods. for examples, T shirts with simple prints, your spec and your design, minimum order is about 400 pcs. i dont know about the terms for accessories.
now that market is pretty much jacked up, you can get things at a killer price.
and yeah, if you order enough, they will do free design/samples for you, too. which means, you dont need to hire anyone.
you might want to take a visit.
edit: if you only need a few samples/items, hmmm... it wont be so easy..