That's a lot of power, battery and solar.
Paralleling more that two banks can be a issue keeping the charging and discharging in balance. You could run them in series for a higher voltage inverter and then convert down to run the trailer.
Our loads, bank and solar are half of yours at least but our 720w solar is on the ground so far. That'll give us 50a any time the sun is out. The 100a or so you will see will not only work on charging, but once you get to a point it will start running the rig with what the batteries don't take. The only time our batteries are out of float is over night when we use little power.
