Matching property management to your portfolio is more nuanced than most think.
Have to be very careful in pairing sizes appropriately. The PM firm with 10,000 units across 35 buildings isn't going to provide the touch points you need for your 10-unit.
Need to seek out the emerging mid-sized PM companies, get in front of them, and ultimately determine if they're a match (references are huge here).
A search for that delicate blend of good people, an embedded sense of urgency, attention to detail, responsiveness, and general market knowledge (to bolster your own).