I would agree that a great PM is a great investment. For years I had a quite good one, with RE chops and local access to some of my properties. She decided to retire (at over 90 years of age!) a few years ago. I wish I could find her like again! Although it's true most SFR are pretty placid, the times when they are not are definitely anxiety-inducing, I agree.
I have a handyman who is looking to do some investing, himself, and he's done repairs and maintenance here on my residence, and I trust him a lot. That's a real asset. So I do think that when you have a maintenance man (or team) that you have high confidence in, that soothes the anxiety. It's not quite enough to make up for self managing but, it's a good short-term move
BOTH of these can be hard to find and retain, though. I hope you can find both, or at least one, to help you out. I have family members who are in similar situations to yours and I really feel for you!