Seriously, are you really prepared to take on the cost of shipping and financially covering damage costs to the costumes and props if an accident happens? And then are you going to launder the costumes and pay the shipping to send everything back?
Honestly, after paying for all of this you could easily buy at least one costume from ebay.
I really think your friend should have planned a lot further ahead for this project. It might be wiser to pick less complicated costumes for his project than to try and rush all of this.