I used 3 10' pieces of 3/4" EMT pipe for this build and I have a little bit left over. I also bought a small section of 1/2" allthread, 4 brass bushings, and 2 locknuts for the allthread to fashion the hinge. I also picked up a 17"x21" wire basket that is used in closet organization kits. I did order the actual B.O.B Yak skewer attachment from REI.
EMT pipe $10.50
Brass bushings $10
Wire Basket $8
Skewer plus shipping $30
So for roughly $60 and a day and half of time, I think I made a good decision.
The wood piece was made as a jig of sorts that I used to help position the top and bottom pieces. I drilled 7/8 holes then cut through the center of each.