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?

I have used connecting wire as speaker cable which was simgle stranded heavy guage copper that I used 3 to makes a braid. They worked really well,- impurities and all. I eventually only used them as jumpers, then they got replaced by expensive Cardas. Honestly I heard no meaningful differences.

Mechans is spot on. I love the sound of heavy gauge , solid core copper wire. If you have not tried, then don't knock it until you try. It has bested all of the highly reviewed and priced speaker cables I have owned over the years. Yes, the stuff you can buy at Home Depot!

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?

I ran 14 gauge and three runs of each for each. Three neg and three positive. I also braided mine. Be sure to get THHN solid core copper.