Having done a lot of oilfield construction projects in a previous job, if the customer actually shuts down, we could get stuff done way faster.

So yes, making a project take 1/4 the time, provided it's shut down and empty other than my crew was often realistic.

There's a lot of extra work in not disturbing people not involved when things have to get done. If you have the run of the land, you can get stuff done fast and safe, and correct.

Prime example. Think of renovating a one bathroom house, while having to keep the bathroom at least "usable" by the end of the work day. Lots of repeated work to keep a toilet and shower usable. And it limits your options for shower replacement to basically prefab fiberglass that can be put in place in a shift.

Now think of a two bath house. You can basically shut down the one, gut it, and it actually goes faster because you don't have to bring it up to a basic function every day. Much easier when the kids are at the other parents for the summer, but still workable.

We're basically in our two terminal places, in a situation where the kids went to their mothers for the summer, it's just you and the wife/husband, and it's no big drama to go down to one bathroom.