The real professionals will lay everything out up front, likely letting you read a copy of their agreement to understand additional services and benefits in detail, and aren't going to be pushy about getting you to sign anything if they feel it's a bad fit or something doesn't align.At the end of the day, a good PM will have your best interests in mind.

You are locked into an iron-clad agreement to use them for management. 

Don’t sign a loan agreement until you fully understand the terms of the loan.Only Sign a Fully Completed Contract: ever sign a loan agreement that contains blank spaces where information should be entered.

A couple of questions to ask... do they lock you in for a year or can you terminate the agreement with not penalty if they fail to perform? 

Many times they do not yet have the property under agreement.

A professional Private Placement Memorandum, Operating Agreement and Subscription Agreement6.

Is that part of the agreement with the seller? 

I only work with investors that work exclusively with me with a written agreement.

Quote from @Olga Daisel: You offered to terminate his agreement early in exchange for three months of rent.

Hello, I'm purchasing a single family home from family without an agent & want to make sure the Purchase & Sales Agreement I drafted is adequate.