mppt vs pwm

That's definitely in my pricing equation. The biggest benefits I have is the amount of space I have available for my setup and no hard time frame to have this completed (although it would be nice to have it together for a Colorado road trip in July).

Here's a quick and dirty source for 12' of 2-conductor 8 gauge wire:

http://www.harborfreight.com/12-ft-8-gauge-heavy-duty-booster-cables-69295.html

16' of 2-conductor 6 gauge wire:

http://www.harborfreight.com/16-ft-6-gauge-heavy-duty-booster-cables-60396.html

12' of 2-conductor 10 gauge wire:

http://www.harborfreight.com/12-ft-10-gauge-heavy-duty-booster-cables-69294.html