boondock and have your fridge/ac/micro
The first thing is to realize and accept the fact that using the AC off the batteries is not a reasonable expectation. The battery bank would be far too heavy for a fifth-wheel to be able to run the air conditioner for any significant amount of time. I'd even be very conservative about using the microwave. But the MV is used for short periods of time. If the AC is needed it would be run continuously.
It is the refrigerator which would be a large factor in determining the capacity of the battery bank. (my opinions)