Espalier support posts

I’m getting 2 Asian pears trees and hoping to espalier them.

What are some options to use as espalier support posts? Something not too expensive that I can just hammer into the ground.

The bare roots that I have seen (the espaliered ones) have had bamboo stakes running horizontally, and maybe a vertical one as well, and the branches were lashed to the stake. I’ve also seen cattle panels or trellis panels used.

I wax lookung at these posts