I grew up in rural VA in the 70s-80s. One bathroom in a house that was built in 1890. I was lucky, as the kid down the (dirt) road did not have a bathroom, rather an out-house. That house had a single cold water faucet in the kitchen. Seems to now have plumbing, evident by the vent pipe in the roof.

https://goo.gl/maps/dSFy1wx8G5C4UpZ5A

I suppose this is all hip now with off-grid living and van dwelling. Back then it was called poverty.