Yes, just a day sailor.

I found the book on Amazon so I'll definitely order it and give it a good read.

This wire is about $90 for 100ft of 12awg triplex wire. https://www.amazon.com/Ancor-Marine-Grade-Duplex-Cables/dp/B000NV2AVS

And would a single 100Ah battery like this one be sufficient with a 50W solar panel for what I'm trying to do? https://www.amazon.com/Universal-UB121000-45978-100AH-Cycle-Battery/dp/B00S1RT58C/