Is it better to charge daily or monthly?

[Mamma_Mia]

I have a daily fee and I charge weekly. They pay me for that week, or they don't come back for the next one.

I'm the same $35 a day = $175 a week to be paid on Friday of that week.
I had one family who would short me a day or two....notice the word HAD. They got the door....my current family accidently shorted me $40 ONCE and when I mentioned it to them they were willing to drive 20min to give me the money at 9pm!