What is the goal of this fence? Are you planning on keeping it permanent or is it a temporary thing? I think we'd all be able to give you better advice if we knew the purpose of it.
If it's going to be permanent, don't mess with 2 wire, go with a legal fence if it's on the property border (that definition varies with area, but here its 5 wires with droppers)
If it's a dividing fence that's relatively permanent, I still like 5 wires, but don't use droppers
If it's a rotation grazing fence that you're taking out on a regular basis, 1 or 2 wire with a 3/16" poly/stainless braided line is good enough, both hot, and I use 3/8" steel posts I can drive into the ground with a hammer.