Pretinned (NOT pre-bond) 24 gauge copper hookup wire. approx 890 feet

Tried it, didn't like it. The strands are individually tinned, rather than my favorite "pre-bond", so you still need to twist them together. Didn't solder as easy as pre-bond, so I went back.
My mistake is your gain.
These are 100 ft rolls, most of which are unopened. I only used a couple feet off the green and white, irrc. This is a little less than 8 cents per foot. Also works as trip wire.