I didn't have to extend the 24 pin or the 8 pin to the motherboard or the cables to the videocards.
I did extend every other cable in the case so that they all went to my control box. There are no stock molex cables that extend out of the box.

I believe I went thru approx 80-100 ft of wire.
That's why it looks kind of simple which was the look I wanted.
It takes a lot of work to make something look simple!