>> In terms of a modern load, Steve and Bucky didn't have that many clothes and linens together, likely as not. <<

Probably true. They had very little, and Steve being Steve had a hard time resisting the temptation to give even that to someone who had less.

>> I'm not sure when the Chinese laundry switches over to machine and coin-op. Basin, with a wash board. I'd think any tub would have been a communal floor, saying their building had such a thing. Not all buildings had hot water. <<

They probably washed a lot of things in the sink, and dried them on a string stretched over the radiator.