Speaker Wire Question...
Growing up a poor boy, I used whatever stereos, speakers, & wire I had or got cheap without too much thinking about ohms or wire gauge. Probably didn’t sound as good as it could have, but usually worked just fine (for the price). As long as you don’t have more than a couple of speakers on each channel, everything usually works ok. Probably the most important thing is to get the speakers phased the same so they are not working against each other.