I was wrong about everything! (Suspension problems, part 2)

I expect if you need to sleep in it, they'd either let you stay on their lot, and maybe plug in, or let you take it and return again in the morning. Depending on what they do, it is most likely less than a day's work. They are pros and have all the tools to do things fast. Adding leafs, working with sway bars, those are jobs of an hour apiece, probably.