Below are ones I have experienced over the past year with 2 PMs (on my 3rd now):Lack of rent due date enforcement (communication, fees)Lack of consistent (or no) eviction filing after late rentLack of communication with owner on late rents and the game planTaking weeks to make-ready units (increases vacancy)Not inspecting to ensure that maintenance was correctly done on the turn (and showing units repeatedly with the incomplete work)Paying all contractor/vendor invoices blindly with no inspectionsUnits not ready when vendors show up (painting, flooring, etc.) - no key/lock box, maintenance not finished, utilities not onNo system for ensuring that maintenance was completed as requested (other than resident calling them a week or two later to complain)Late monthly settlement of balance due to the ownerImproper screening of residents leading to lease breaks and abnormal turnoverIncreasing rents without consulting the owner (yes, that actually happened on 8 of my units)Lack of contractor depth leading to maintenance delays, downtime on turns and higher costsLonger vacancy period during resident transitionsNot showing units quickly when contactedNot refreshing adsNot having a good pulse on market rental rates or small items that could help a unit rent faster or for moreGrowing pains that many small businesses faceInexperienced staff with little or no supervision (owner too busy)No system/process to sell renters insuranceNot actively working with a collection agencyOut of all of these, the biggest challenges are/were (1) improper management of contractors and maintenance (2) basic rent collection and systems/processes around due dates and (3) improper screening.The two PMs I used were very hard working and honest people...just lacked proper processes and people.  

Put a closed blind in the window then insulation and cover it up.

Some people go through life spending everything away blindly, then look for a bailout from others.

And the www.biggerpockets.com/starthere And maybe just one more, OK,  two more things: Learn enough so you never have to blindly trust.

But just don't blindly accept the numbers given to you.

The caller was a blind person and did not want any open flames in the rental.

Im legally blind so typos are very common for me....ha ha.

And don't take my next comment the wrong way, but the "new" Homeowners that are buying homes for $150.000 in what was a $300,000 subdivision 2 short years ago are not helping the situation of declining property values, with their Lack of care in landscapeing, bed sheets hung in the windows in place of blinds and more jalopies parked on the street than a used car lot.

The country is paved with the wreckage of would-be investors with a few nickels put together who bought tax deeds (or notes, or liens, or properties, etc.) blindly. 

Before you blindly switch over, it is good to know what your numbers are.