Timothy, going to jump in as I lived off grid for 12 years. You're being way too precise on figuring your power requirements. Things never draw exactly what you figure on paper for power requirements. You need to get a ball park figure like you've been given already then factor in at least 20% higher for everything. Panels, batteries, chargers, generators, etc.
A 12V system needs to be charged during the day to at least 14.1V then float at 13.4V after that. These values will need to change with any battery temperature changes. Having a good inline meter that you can use to monitor voltage and current draw is essential, it is the gas gauge. I used the TriMetric and it was great and never had a problem with it.
So, during the day when voltage is higher everything is drawing less current, the opposite at night.
Having a large enough battery bank is a key component. One that can store enough of the unused solar power from daytime to use at night and on cloudy days.
Even after you think you have everything figured out down to the watt you'll probably end up having to add batteries and/or a solar panel or two once you start actually using the system. Things on paper don't usually line up with actual use, especially with a totally off grid system. Predicting how much sun you'll actually get to generate enough power for each and every day of the year is next to impossible. That is why systems are oversized significantly.
My experience and what I learned from 12 years living without grid power.
There are lots of solar information and sales sites but I particularly liked this one:
http://www.backwoodssolar.com/