It's a nice personal achievement, but I can't help myself cringing at business models of this kind. It's plain old extraction of surplus-value, adding very little to the economy as a whole. The workers would be better off operating as a cooperative, I wish they had the education to know that from the outset, and the means to implement it.
I'm sure they realize at this point that they could be running the same model. The profits at this point probably aren't even enough to cover the salary for one person to be doing everything this guy is doing. The cleaners could do these things themselves, but they would still need to compensate themselves for their time. So, the profits would just go to more hours worked rather than going towards everyone getting a…
Why do you assume that? There are plenty of people doing those kind of jobs who can't read or can't handle basic arithmetic.
It's not a given that they'll be able to set themselves up as this guy has done.