I understand. I worked as a t-shirt silk screener and understand about turnaround times on custom items. If one were to purchase a single shirt, it would be over $40 with setup fees, but 100 shirts would be around $80-$100 for a basic print.
Price breaks come with quantity and you are doing a great service by allowing everyone to have a chance to win something cool.
Yeah for sure, these shirts are made using Dye Sublimation printing. Its amazing.. but you pay for them to print the pieces, cut and then stitch them... then im sending out worldwide lol :D