I employ cleaners because I’m disabled. I’ve had a number of arrangements over the years: self employed single person, companies, people (usually students) doing it as a side hustle who are directly employed by me, who I pay through PAYE, with holiday and sick pay and all materials and equipment supplied by me.
Without a doubt the best cleaners I ever had were 2 small companies, but they both folded because they couldn’t make their businesses work on the prices they could charge in my area, which is low waged.
PPs assume that if a cleaner works ‘full time’ she is paid for a full working week, 37 hours or something, but this can almost never be possible. Travel time between jobs can be very significant, clients cancel, or don’t need you any more, and many regular jobs are just a few hours duration each visit. Meeting new clients takes up time and there’s all the time it takes to run your business, including equipment, running a vehicle, liability insurance, personal insurance, sourcing materials etc.
Tbh I think many self employed cleaners are charging far less than they need to, to be viable long term, and they are giving us a present of their underpaid labour. Several self employed I’ve contracted with charge low rates because they have a partner who’s better paid.