Looks like you’ve made great progress!!! I was concerned about getting your wires down the walls but sounds like it wasn’t bad at all. I tried running wires down the wall in one of my other MH’s and kept hitting insulation.
Really glad you found the wire nut before it became a big problem like we had with our water heater.
With the temps you’re getting I think you may need a down comforter for the bed and a binky for watching tv. Great job