Co-hosting rates - what is a reasonable cost?

[Nancy Bachety]

My husband and I have been successfully running an Airbnb in our primary in NY for almost two years now ( what @Ben Leybovich now enjoys and promotes in his book). We confidently purchased another luxury home in FL for a few investment reasons, including STR using mostly Airbnb and self-manage that from out of state. All is well with both styles.

My question is this: I am going to be the local go-to person for a host who has 4 units nearby us in NY but who lives out of state. They are mostly for longer stays ( 5 day minimums - up to a few months). She will continue to operate her calendar and bookings. I will manage her Cleaner’s and be available to arrange maintenance, as needed. 

What do you think is a fair arrangement? I was thinking - $100 flat monthly fee for being “on call” plus hourly for house checks and visits of $30. Can anyone offer feedback or your experience with this?