Less harsh colors will look better in new pics.

You could talk to her and ask her once she's caught up if paying half on the 1st and half on the 15th is easier for her, but they MUST be paid on time.This may sound harsh, but you said "She has 3 children, and he bailed." 

If you feel they're being too harsh, think about their intent.

You wouldn't sleep in the middle of savannah, exposed to all the animals and harsh conditions with assumptions that lions, wolves and coyotes are your friends.

It leaches chemicals into the water, does not last as long as copper, rats chew through it.

I don't think we'll see a GR- like crash, I do think we'll see a harsh correction though for sure.

If the cleaners use the proper chemicals and the mold returns (and there are no leaks, drips, and adequate ventilation), call the mold ghostbusters!

@Bryan Liu this isn't going to be what you want to hear, and it will sound like I'm being harsh.

It may sound harsh but that's just the reality of it. 

If the chemical balance is maintained, it will stay clean.If guests stay for less than five days, your tub should survive long enough for you to balance the chemicals again.