I’m in exactly the same boat as you. Undereducated, lower paying job than my wife, mortgage, etc. I’ve frequently had panicked thoughts about what I would do if she died. And we have a kid, which makes it even worse.
I think it’s really interesting too, but he was my grandfather, so I’m biased. I wasn’t really sure how interesting drawings of screw threads and gauges and calipers and such would be to other people.
Rent requirements in the US are nuts (i.imgur.com)
My grandfather was an aircraft inspector for De Havilland in WWII. This is one of the notebooks he used to study for the job. He drew all the pictures. (ibb.co)