Wife and I installed the wash/dryer in our 2016 38rd a few weeks ago. Start to finish was about 3/4 of a day. Looking back on it, it was much easier than what I realized. As far as wiring, there could be some but most of the wires are ran in the basement or ceiling. The bigger challenge is going to be missing the studs in the wall.
F450 leading the way for our 2016 38rd Redwood