the only other caution i'd give anyone contemplating this regards quality control - you can't always count on the manufacturer to make sure everything is ok before they ship to amazon for instance, i'd recommend supervising the manufacturing process if you can, i met a photographer who had a large run of art books printed in the far east, he basically slept in the factory during the print run, every 2-4 hours they would wake him and he'd check the printing - it was a few days or a few weeks for the whole job 24/7

or i guess have an agreement with the printer that they will reprint and ship any defective items at their own cost.