What are your thoughts on my service sub arrangement?

Basically a Femdom/humiliation kink where I come in, strip, on my knees, several rounds of face slapping where she gives me instructions for the day

Cleaning followed by inspections, more face slapping of not up to her standards, eventually the place is near spotless and I'm rewarded by being allowed to give her a massage and sometimes ass worship

I use to bring her flowers or chocolates but I just give her $200 instead