Standard RV fridge will mostly run on propane and is not a huge 12v draw.
The rest of the stuff can be run from a 300w inverter. Microwave needs 1800+ watts, electric coffee needs 800-1200 watts and other big stuff that can often be avoided.
MC4 is excellent IMO. They are specifically designed for all conditions up on a roof for 20+ years.
Midnight Classic 150 IIRC goes to 150v Voc so I have to recommend series panel connection with just two wires coming down. Due to the high voltage I do recommend an appropriate switch on the panel connection for ease of service and safety.
8x T105 is a lot of battery. With a small inverter and LED lights you may only need two T105s and four would get you through a period of clouds/rain. If you go 2000w inverter then you do need four but I would wait and see if you need the second set of four. Could about go to a 24v system at this level.
Whole house inverter connection is fine. I only recommend sine wave inverters.