Sorry for the lack of updates!
I’ve been working on the third wall — the 20′ long one that runs the entire length of the house.
As of now, I have the studs all cut (will have to go back later and cut the headers and cripples for the windows).
Last weekend, I assembled the “outline” of the wall: the first and last stud, the top and sole plates.
The biggest challenge was getting the sole plate around the wheel well and spare tire hitch. I messed up and mis-cut the wood for the wheel well, but the spare tire hitch went well.
The next step is to cut the wood for the cross-beams between studs, then install them and the remaining studs.