Eddie lives in one of the last remaining free states in America where the inspection requirements are fairly limited, so he can get away with that. You couldn't here, and David most likely would be in the same boat, I suspect. To move in we had to have 1 fully functioning bathroom - toilet, tub, sink (shower was not enough), plus a kitchen sink, and an installed and working fridge and range. Safety stuff had to be covered too like stair railings, etc. And a heating source was required. Prob missing a few things from that list. I got by with fully finishing one bathroom and then pulled together a temporary sink in the kitchen, and bought the fridge, oven and cooktop and got them all connected for the CO. I also did final plumbing, electric and a few other things at the same inspection so i never saw the inspector again after that, which is good as he was one of the jerk/power-tripping types of inspectors.
It is a question worth asking, but I am suspecting the answer won't be positive, and David may already know that...
Of the options, either getting some short term help (maybe that crane guy?) to push through it quicker or renting elsewhere seems to make the most sense to me, unless you want to keep the camper long term. But that is just my opinion... Finding someone to help who is both capable and available NOW would be the hardest issue, I'd think.