DIY Speaker wire

I need to run 4 sets of speaker wire 24' over a stone floor. There is a fireplace between my speaker (best placement in my 1,100 sq' room) giving me that space behind the main sofa the best placement for my rack of gear. I have removed the passive crossover from an old pair of Speakercraft (4)ribbon/6.5" cone combos and are bi-amping with a pair of vintage McIntosh M60s and Audio Research Classic 120s (4 mono blocks.) I do have a Von Scheikert Tower sub as well. 100 feet of spendy cable could be a fortune. Ideas?

Mechans, What gauge solids did you braid? Am I to assume you braided 3 each per binding post? Again I am running these 24'. and there will be a set each split at 1200 htz. What of single wire 10 awg?

since I have to run 25 feet, might I braid a larger wire, say 12 awg? Also Since they are over a stone floor I thought I would put them into a "wiremold" floor raceway that has 5 tracks made of aluminum. What about polyester expandable sleeving? I've also seen posts where rather than binding posts , solid copper is hammered into a loop.

Ngjockey,
I just ordered 4 sets of your silver plated copper wire to run in while I braid 750 feet of solid core (THHN thanks Grannying and Mechens!) I'm thinking this project might just bE DIWF (do it with friends) instead of DIY....

Hasn't shown up yet. Just ordered yesterday. It looked to me that each of the (2) wires had an awg of 10. Will post when they arrive