First, make sure you know what your qualifications are since the real estate agent will need to narrow your search based on your pre-qual.

If it's a larger organization, feel free to inquire about their different staff qualifications.2.

I would also start out but creating a list of minimum qualification criteria(which you place in your ad) which can automatically weed out some of these responses.

Do your research and make sure the person has experience and not just a qualification.

My question for you is: What are the qualifications that need to be met in order for a commercial multifamily loan to be granted?

So I was hoping the Bigger Pockets community may know a contractors qualifications needed to get this done.  

If not, what's the average rates and other standard qualifications?

Focus on efficient qualification early in your interactions with a seller, and make sure the message you convey when talking to a seller is aligned with the messages you've been delivering on your mailers. 

Or do they have rental history, income requirements, work history, credit score and criminal background check qualifications.)I find that it is important to know when they purchased the property and what did they pay. 

You should talk to the Housing Authority to see what is allowed, how the program works, how you can verify tenant qualifications, etc.