I wish that I had the time to build them to sell. I have about $45 total in materials in both of those (with some left over) and they sell for over $100 apiece if you go to buy them.
The allthread would definitely be easier but the c/r was cheaper (purchased at metal supplier / recycler).
I would have more in it but the brackets wound up not costing me anything to have bent. I don't have access to a brake so I had to have a fab shop do it for me. They wound up splitting the first piece so he didn't charge me to bend it. (Lucky for me, I bought plenty)