As in the first diagram, they have shown the exact location of every electrical device. I would make five new diagrams, one for 12VDC electrical devices one for 12VDC base system (batteries, trailer wiring
12V distribution, inverter, converter and Use/store switches) and one for 120VAC, one for entertainment and internet, and one for solar.
Here are some considerations:
1. Lights should all be LED 12 VDC so they work without shore power.
2. I don't see a furnace in your plan, what are you going to use for heat when you don't have 120VAC available?
3. You need to decide on the switch locations before you make the wiring diagrams
4. You need to obtain the rated loads of each device
5. What about USB ports? edit: oh you got this
6. The water heater has a switch panel to control it. You need to decide where to put that. The panel needs 12VDC
7. The shower needs a light.
8. Cabinets need lights
9. The AC/Heater needs 120V and
12V power
10. The refrigerator needs 120V and
12V power
11. Outdoor wall socket?
12. You need a Converter and inverter
13. You need to decide the locations for these and the 12V buses and grounding plan
14. You need a lpg gas detector
Once you have this all figured you can learn a bit more about wiring diagrams or find an electrician or engineering friend to help you with it, or show them here as you progress.