How long does it take to build a Whizbang Plucker?
If you purchase a pre-made, pre-drilled, HDPE featherplate with a pre-mounted-and-perfectly-centered driveshaft from me (see below for more info about this), and you have all your other parts on hand, you should be able to assemble the plucker in a day. Figure a couple days (maybe longer) if you make your own featherplate.