I'm happy to share with everyone my IKEA hack 6" tray cabinet.
I found a 24" cabinet box in IKEA's As-Is section and took it home for half price ($23)! I would have preferred plywood, but my table saw is a little small and cutting large sheets of plywood is a little scary. When I deconstructed the cabinet, it sustained some damage (as its particleboard), so if you try this at home, be careful! I ended up changing the depth to 22" in order to cut off the damaged piece, but that shouldnt be noticeable with average trays and cutting boards.
I used Ana's 6" tray cabinet plan and modified the dimensions a little for my planned space. It still needs the back, face frame and door (which will be a replacement drawer front from the cabinet manufacturer). I plan on building the face frame at the time the cabinets are installed, since this will go in between the 36" corner easy-reach and the 36" sink base. Once its done, I'll post updated pics!