I guess it depends on your application. If you have a $$$$$ motor than yha go big or go home . But on the cheep not easy I would just run metal stran .
Metal stran? I guess this is single, individual wires?
I used 9 wire TRAILER wiring from the dash to the transom/wiring block on the the back of the motor.
Its all sealed, like an extension cord, and 9 colors...
I did run an extra ground wire, just to make sure.
Dan'l