What is a good percentage for managing services

Starting to invest in new market at Midwest. I’m starting to invest small in a class C duplex with a low gross income of ~$2000/month.

Don’t have the bandwidth to manage. Found a manager willing to take 10% per month. Plus 1 month rent per new contract. And $100-300 per renew lease. In addition mark-up on any maintenance request or $100 per maintenance event.

There are other add-on fees like eviction and late handling.

Not trying to go cheap but feels like it’s too much, especially the maintenance mark-up and add ons on top of 10% fees.

How to tell what good value for the service?