Hmm, bending under the weight would be pretty bad.
Actually it’s that while I can get wood easily locally (local saw mill – you pick up a 10 foot oak, 5 foot poplar, 6 foot oak, some cedar, hey, how much? $20.) metal is a different story. I can find the square stock, but stainless steel circular tubing seems hard to find. I was just looking on Amazon and there were no .05″ or thicker that I could find, and the .039″ seemed to be more expensive than the cold rolled steel in much thicker walls. Shipping just about kills all online sources except Amazon from my searches online.