Speaking as an excellent tenant , a good property manager is a must as it will make both yours and your tenants life easier.

In the last place I rented, I had 4 different property mangers in one year, through the same agency. Getting anything done was a nightmare. We had maintenance that needed to be done when we first moved in that still wasn't done a year later. No inspections until 3 months before we moved out. We could have trashed the place and no one would have known. The last property manager was the best. The air conditioner broke and sh had it fixed within 2 days, she actually did an inspection. In fact I found out she had every property on the books inspected because none of them had been done. She was absolutely horrified about how it was run.

Also, the tenants are entitled to leave a place as they found it. So if the garden is overgrown, house dirty (not that I am saying yours is), they can leave it like that.