This is what I ended up purchasing (paid links):
DCC50S On Board battery charger with MTTP: $399.99 All-in-1. Smart isolator to isolate my start batteries from my aux/house battery. Battery charger that will charge my sealed lead acid deep cycle battery in stages, but can also charge gel, AGM, flooded, or lithium ion batteries. Solar Controller that will use solar power to charge my AUX battery, and once it is full, it will trickle charge my start batteries with solar power. Battery monitor, with the BT-2 module, I can view the entire status of the solar/charging system with the DC home app .
BT-2 Module: $39.99 Allows me to use an app to monitor my battery charging, solar inputs, load power consumption.
Waterproof 70 amp circuit breaker: $24.99. Safety measure between the start battery and the Renogy DCC50S controller. Don’t want to accidentally fry my battery charger. I choose circuit breakers over inline fuses, so I wouldn’t need to replace fuses while camping. It saves on money and allows me to quickly reset the breaker while on the road.
Waterproof 60 amp circuit breaker: $26.99. Safety measure between the Renogy DCC50S controller and the AUX battery.
Ampper Battery Master Disconnect Switch: $17.97 allows me to disconnect my start battery from the Renogy DCC50S controller or disconnect the AUX battery from the controller
6 way fuse block: $17.98, to connect my loads to the battery.
4 Gauge AWG, clear black, ground wire, 25 ft: $15.63 f or the ground wiring
4 gauge AWG, clear red, 25 feet: $17.71 for wiring up my system
4 gauge copper terminals with heat shrink (10 pack): $11.95. for connecting my cables to battery/controller
625 piece, Heat Shrink Tubing Kit: $9.89 extra heat shrink for connecting my battery terminals to the cable
Sealed Lead Acid Deep Cycle 114 amp hour battery
How we will wire it up this weekend: