Army;
Your listing of all loads in the vehicle and totalizing of currents is much what went on, on the electrical engineer's desk during vehicle development...but you did not include one important factor...a column which might have been broken down to show if load use was 1. Continuous, 2. Intermittent, or 3. Occasional...and this column would determine "weight" of the current which would get added into the total...by adding all at 100% without this (including some generous "guesses"), you come up to the high 100A total.
Bottom line is: A 60A rated source will supply all the needs, and have plenty capacity and headroom for additional lighting, or other loads, while still keeping the Battery charged fully (and this has been confirmed by tests and numerous field experiences).
Cheers
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