Best budget, high current, DIY power cord wire?

It's rare that opinions are diametric opposites, though clearly people have different aesthetic proclivities, which, hopefully, are able to be expressed. I find that people agree with a reasonably predictable frequency -- about practical matters anyway, not necessarily about theory. And notwithstanding the issue of synergy, I believe it's still possible to make useful generalizations.

Photon46 speaks a great deal of truth. The ultimate performance of a power cable in a system is dependent on synergy to a great degree. This is why I suggested the Supra LoRad cable for $15 a meter.

It will outperform your standard stock cable and give good performance for only $70 for 2 meters fully terminated with Supra plugs.

This meets your need for a low cost cable that is cheap and will outperform the stock cables sent with gear.

I figure that just about anything (some will not agree) will outperform the stock cables. I'd like to get the wires and plugs that outperform their brethren of the same price point, say wire @ 12/ft or less, and plugs at $50 each or less.

Hello, Grannyring. Looking forward to trying your TRL/FIM interconnects!

Those CRL interconnects are very special.