I built my tie walls using 1 1/2" rebar outside- didn't need to drill the ties. Not as pretty, but nobody ever told me I was.
The yard where I bought the rebar cut it to spec for me; breezed through it with a torch.
Chainsaw did fine for my relatively small jobs.

Campfire Pistolero x2

Only one human captain has ever survived battle with a Minbari fleet. He is behind me. You are in front of me. If you value your lives, be somewhere else. -Ambassador Delenn, Babylon 5