By the way, congratulations on building your own whizbang! We processed our first batch of meat birds this summer (70+) and used a drill head plucker that we made. While it was somewhat faster than plucking by hand it still took a very long time, and was difficult to control. We tore some skin in the process. So, we bought a drum plucker to do our turkeys this fall and future batches of chickens.
We are hoping, in order to help offset the costs, to rent it out. Otherwise it will just sit unused between batches of birds We live near Lapeer, Michigan -- so if anybody in the area is interested in renting we'd be happy to hear from you. $60 for the first day, $30 for each subsequent day, and a $100 refundable cash deposit which is returned when it's brought back clean and in good condition.