110V AC & 12V DC layout plans

You should have your lighting on at least two circuits. You want to minimize the possibility of being completely in the dark if you blow a fuse. Also balance your loads on the 110v side. Example-I cannot run a small space heater in the bedroom and turn on the coffee pot at the same time because they are on the same 15 amp circuit. DW cannot use her hairdryer tor the same reason. In this case two GFI circuits would be nice, or maybe three. Yes-these are heavy loads, especially with 30 amp service, but principles are the same. Sorry-not sure if I know how your main 110 will be wired.