There are numerous options available.  

Sometimes it's ambiguous, but even then, why should I bother with the company that has numerous unresolved lawsuits, versus another company that is virtually the same but has none.

I have had numerous issues with the PM not fixing things at all or in a timely fashion.

Since then I've read, and continue to read, numerous real estate and self-development books. 

He discussed the numerous pros to hiring a company in the beginning.

Your in over your head with that many properties, I have been to numerous Philly auctions and there is a sea of people who will just outbid you to the point it’s not even a deal. 30 properties is not feasible and chances are half of them won’t even be auctioned that day.

There are numerous part time agents in this area doing in excess of $3 million annual volume.I know this comes down to my own goals and risk tolerance, but do any of you have an opinion or advice when deciding who to go with?

That property has been for sale for a while on numerous sites. 

While they're great and have invited me over numerous times for a beer and BBQ, I don't want to blur the lines of our Tenant/Landlord relationship.

Along the way the GC and subcontracted plumber mentioned numerous times that they found great news or thought of more efficient solutions (i.e. the mainline plumbing under the basement was intact--that they had assumed was all broken and needed replacing).