9.6 Bigfoot Dual Batteries

I am trying to put 1 or 2 batteries in the basement and really don't want to do the maintenance associated with the wet cells. I have wet cells now and neglect them too much to justify buying the same type. I would like to set and forget them for the most part. Plus I want them to be in the heated basement where they can stay warm. It would be hazardous to keep flooded cells in the basement. I can also run the AGM's down pretty low and not do as much harm. Let's all face it we do push the limits of our batteries in times of need. No one is perfect and I just want to have fun.

As a power budget I would like 300-400 amp hours. I think I can fit a 4D in the stock battery compartment and another one in the basement. They will be about 6 feet apart but we will use 4ga to link them.