Before you spring for a 92 AH group 27 battery, which I'm seeing for $300+ from Interstate, consider this 125 AH AGM for $289: https://www.amazon.com/Vmaxtanks-SLR125-Solar-Emergency-VMAX/dp/B004DR3IIC/ref=as_li_ss_tl?keywords=vmax+tanks&qid=1560295430&s=lawn-garden&sr=1-1&linkCode=sl1&tag=vehicledwelling-20&linkId=26a2244ebe8ea426f3f51fa2ff34c4b5&language=en_US
Being designed for solar applications, it is a true deep cycle battery, unlike most batteries billed as deep cycle, which are really just thinly disguised starting batteries. The clue here is when they list CCA among the specs. Cold cranking amps are not an important data point for deep cycle batteries.