The biggest problems we faced were scheduling and communication.

By nothing I mean no damage to the unit, rent on time, and good communication. 

But if you decide to self-manage, you need to consider (at least):-management software (rent management, communications, maintenance requests and tracking, etc.)

I communicate well.

I'm curious about your thoughts on using AI to fully automate maintenance requests, including renter requests, troubleshooting, and appointment scheduling, while providing personalized communication to residents.Would you consider trying such a solution?

If your PM is not communicating with you on a regular basis about the status of the property's activity and also not responding to your inquiries in a timely manner, that's a problem.

Nobody answers their phone; the phone carriers recently made it extremely difficult to send bulk texts; Facebook only allows me to communicate with a bot; I spent 5k on Bing PPC ads and had no sales.

What's laughable, I mean LAUGHABLE, is your theoretical example from the interweb when I brought receipts using my actual tax statements and 1099s.Secondly, the OP or other questioner has expressed gratitude for my wisdom on this subject.I notice in every thread you respond to, you brag about your own personal success in order to lift your fragile ego so I'll mention that I also recently purchased a condo with a 7.6% COC return in San Diego last year.

Assess their communication style and responsiveness.

This is their reasoning:"Rental makes common area management, communication, and covenant enforcement more difficult, and it increases the resources needed to manage the community.