Lots of stuff in that link. I'm doing the same to a 16' vintage Jayco trailer. New floor ,inside walls and everything else inside. I am just going to follow the old wiring with new since its all there. I hate doing electrical, a big pain in the butt. If you can believe this I bought the trailer for $250 with a working Ac. and all the wires were still intact.
1989 mobile traveler 30' MH, 2002 honda valkyrie motorcycle toad,Grants Pass,Or