This type of thing is till done. One time, I was on a job a few dozen miles from the beach.

We leveled the lot, dug up a few feet or so. Placed markers to check later for settling, then brought in fill dirt to create an "overburden" mound.

I was told that some compaction will occur the first month from the weight, and then a year later they would measure how much more it has settled.

If the was determined to be stable, remove dirt mound, install building.

A surprising amount of indoor humidity is from breathing out.

George Washington was a surveyor, and his job was to mark the borders of purchased properties, so it was a known thing in the early 1700's.

The Texas Rangers started as surveyors when white settlers began homesteading land in the area that supported the Commanche tribe.

It was profitable work, but it ended up being done by men who could defend themselves from criminals, Mexican bandit gangs, and hostile Commanches.

They evolved into law enforcement when other policing organizations refused to go there until it was more settled.

Buy a $15 stud-finder. Studs in the walls should be 16-inches apart, center to center. You can also use a strong magnet to find one or two of the studs, due to the steel drywall screws. Once those are located, the rest can be found with a tape measure.

I've always found that the holes closest to the bend are hard to get screws in, and later remove them.

I'd be forced yourself all four holes on the short leg, simply because there are only four, so why not use them.

On the long leg, I'd use the two holes at the very tip, and then also use the two holes that are "almost" next to the bend.

If for some reason I felt I needed to add a screw right next to the bend, I'd use a very long extension on the driving bit.

Yeah, but...3-million people die each year in the USA, and re-register makes it harder for dead people to vote...