A friend advised me to check reviews online and look for someone local with experience in single-family homes.

When tenants and owners feel cared for, word spreads.

Mount Airy in particular is probably the most difficult neighborhood in Philadelphia to learn and there's no way you can do so from a computer reviewing rental rates and crime assessments. 

Are there any references or reviews you can check?

Check on these jobs somehow.5) Google builder and company names with "feeback" or "review" to see what you may find.It's not really easy to do all this.

If there is a minor stain in need of cleaning that gets missed they can take care of that.

Your tenants need to buck up and take care of the bugs.

Remember, this is still a sales type of business so be very careful on who you choose to work with.

Since they notified you of this, you should get it taken care of as your insurance may not cover a claim if there is an accident because it was a known defect.

The short answer is I look for 9% min and try to press it to 11% with those strategies along with rental increases once improvements are made and the tenants know you actually care about the property.