I do what I do
I've ripped through more automotive and household wiring than I care to admit.
Automotive wire is cheap , stubborn , and prone to corrosion, hence the preponderance of weather tight wiring harness in a typical vehicle.
Dual wall heat shrink, rosin core solder,rosin solder, dielectric grease(I pack my servo's with this) , speaker wire , It works. I like it ,it works for me. If I was to sail around the coast I would still use it.
Copper,oxygen and salt dosent mix on the best day, its a fact of life.. until its cheaper to use gold ..it will have to do.