Slow Crank, No Start When Warm

Alright, ill look into getting some 2/0 welding cable. I'll be sure to post weather or not that was the problem
You might be able to get additional 2AWG wire and double up the runs! Might be cheaper than 2/0 wire.

Either way you can use both sets of wire in the end.

The cross section area of 2x 2AWG is about .098 in sq

The cross section area of 2/0 is about 0.102 in sq