Great info in this thread. I wanted to add some Chattanooga specific stuff for 1950s houses in my neighborhood which is East of the city.
Rough cut lumber is common here in the 50s which is awesome IMO as the homesteads were converted to suburbs. It's really sturdy by now, nearly impossible to drill a hole through strength. The structurally bad part is that we have small, unnoticeable earthquakes all the time and the basements then didn't have rebar, adequate thickness, or good footers. Between that and the swelling effects of high clay content soils there can be very expensive issues. I like crawl space houses here for that reason unless I'm living in it and want the extra tornado protection.
Regarding the wiring comment, yes you can just run the grounds together because they go to the same place ultimately but there aren't enough outlets and the wiring is fiberglass insulated and by now has crumbled away in this climate. Having the glass fuse panels replaced, adding outlets, and pulling new wire is imo the biggest expense with the 50s homes here for a flip. Full basement and open attic does make that easier. For LTR who cares two prong is fine.
The popular roof style was a very shallow pitch and we do get snow. Estimate higher than normal capex for roof.
Interior of the ones I've seen are horsehair plaster with a textured finish. I think it's neat because you'll never see that again but it's way outdated no one likes it. Depending on the class of home you're looking at it could be a factor. Seems easier to slap 1/4" sheetrock right over it then try to mud the whole house top to bottom.
Termites are definitely a thing here. This is where pre 70s is advantageous. The chemicals used then to treat the block basement walls are way beyond banned now. Those basement blocks are a barren wasteland.