No one actually knows how to lculate what speaker cable they need

Thanks for sharing.  Nice ideas on the terminations.  Love to see pics.  

Can someone provide a link for a reasonably priced crimping tool that can handle 1/0 - 3/0 AWG cable termination? Don’t want to spend hundreds.   

Granny ring,

If you use the terminal ring/spade linked above, you can crimp the terminal with 8” channel locks.  The medal is soft.  Alternatively, Amazon has $15 crimping tools, including one that has a cradle and piston you hit with a hammer.  I suggest you try the channel locks first, allowing one of the tabs on the terminal to overlap the other.  To keep the wire from coming out of the terminal, I bent over few of the strands before crimping.  I achieved a very tight and secure fit.

Good Luck

This is utterly fascinating.

I may split the cable into two equal portions then both crimp and solder. A good soldering iron would flow solder without too much difficulty and quickly.  I like the termination process of crimp and solder. I would simply stack the two spades at the binding post. Still thinking on this.