In very few places in the US would "no heat and no toilet" be acceptable, regardless of price.
I'm not sure what happened to them, but there was a startup trying to do this: https://www.curbed.com/2021/03/brownstone-shared-housing.htm...
SROs, residential hotels, boarding houses and the like were all banned in the 1950s (and the surviving ones dismantled through the 1980s), a loss of about 100,000 units of affordable housing.
Consider this lovely e-book for further reading: https://publishing.cdlib.org/ucpressebooks/view?docId=ft6j49...
Or this lovely Simon and Garfunkel song about the NYC homeless on the streets of SoHo, contemporary to that era. https://www.youtube.com/watch?v=PCVnPIE3juc