That's right the limbs are 3/4" irrigation pipe from Lowes. The pipe comes in roles of 100' and I bought it for $12.50/role. It takes 2 roles to make one structure. I bought the barrels for $10 apiece. So I have around $35 in one of them. The full barrels are large enough to be used alone, so for the money they can cover a lot of area.
Snrub, You are probably right that they would be better with more holes. I may add more to them if I get time. Also, thanks for tip on the bits as the wood bits I've been using aren't the best for the plastic.
