I've used property managers since the beginning of my investing journey and it's been well worth the 9-10%. Most of my properties are where I live, but I do have a 4-plex over 2 hours away. I wouldn't be able to manage that property properly if I was doing it myself.
I went through my first eviction a few months ago. The property managers handled everything. They handled the paperwork IAW the local and state laws, took the tenant to court, and eventually retook possession of the unit. The only thing I had to do was agree to start the process. We paid for the court fees, which equalled around $300, but the PM filed all of the appropriate paperwork so the tenant (that was evicted) will have to pay us for those legal fees in order for them to rent again. Our eviction was seamless because of the PM. I'm a big fan.
With that being said, definitely spend time finding the right fit for a PM. I've had a really bad one, and it made owning a property painful and took a lot of my time.