After reading the entire barrel-ponics manual and printing off the lists of pvc parts, taking inventory of tools, etc... I couldn't stand not making at least what progress we were able to today. I don't have the right size holesaws for the drill, so those will have to wait till payday, but saw and ruler and a colored pencil (no sharpie was to be found) we could find.
I know we own a T-square, but it was not to be found, so this yardstick ruler did the trick.
We still have to clean up the edges and cut off the lips of the grow bed barrels, but I'm happy with our progress for the day. I finished the additional cuts in the flood tank section after the photo was taken, in case anyone notices only one hole is cut out. Don't know who made this adjustment from the original floodtank design, but after seeing it in the photos, it seemed 'cuter' and more lumber saving. Used that for a simple real work math example for the kids of how to use those equations: circumference = 2pir, so if we need 8 sections (drawing topview of bottom portion of floodtank yields 4 sections up and 4 'windows' how wide does each section need to be?