I have been playing with Alarm wire, paired, inexpensive, color coded and solid copper. (I prefer solid copper, no judgment on people who like stranded.)
$26 for 500 feet
https://www.amazon.com/Conduct...TG9nQ2xpY2s9dHJ1ZQ==
I have also had good luck with speaker wire, again paired, inexpensive, color coded, stranded, many gauges out there.