If my maths are correct
Frau Kuchs was born in 1930 or 1931; which would have made her a child when WWII began in Germany. Thus she certainly lived through that hell and the aftermath.
Still notice wedding rings so perhaps while there was a husband there aren't children and or grand-children. That and or maybe like so many instances one of both have moved away. At the most horrifying Frau Kuchs simply could have outlived her husband and any family.
Again it is so good that not only was Frau Kuchs able to take over/work at this Wascherei but she started at around 50 and is still going. Here in the States unless it was a family operation she'd likely have been given the push.
Have to hand it to European men and fashion; they just know how to pull things off.
The first customer (a chef or something going by the uniform) with just the dark blue muffler. Then the slightly middle aged man paying is bill dressed in torn jeans, Converse trainers, a freshly ironed shirt and hoodie. Not many can pull that off but it works well on him.
Those huge Miele gas heated ironers are to die for; you see them all over Germany even in "home" Wascherei establishments, but doubt many American homes would have the proper gas supply out of the walls. Likely some sort of upgrade would be required.