the turn key marketers  ( just think as real estate brokers nothing more nothing less)  their clients are the guys and gals that live in the market buy the homes that need rehab and then resell.. they are flippers.. then many will have in house management which makes them " turnkey "  the real risk as Ivan is talking about is buying low end C class.. for most out of state investors over time the expense's create an investment that maybe you would not have made... where as A and B class tend to run fine in any city you buy them in or anyone you buy them from... you can go right on MLS and buy them.. 

I think the customer experience using these companies will vary widely depending on the specific crew/ store/ location of course. 

Thankfully, I found a broker who is willing to help me round up distressed homes (fixer upper, TLC types) near the Denver area and its surrounding suburbs/outskirts. 

Loopnet is definitely one channel but it generally has listings that nobody wants to buy (there are exceptions, of course).Most large MF deals are listed and marketed by commercial brokers such as CBRE or Marcus & Millichap.

Unless he's a RE Broker he can't PM for you after he sells, in Missouri you need your Broker license to PM a property that you don't own, unless you're an employee of the owner.

They are also known for their great customer service.

Sure, it can help if you're talking to people to mention that you are a broker, but outside of that, you don't get any special privileges or knowledge just from earning your RE license. 

Does anybody know what is the best way to get in touch with local multi family broker?

Real estate, especially multifamily, is a team sport and you won't be able to do this alone.Attend a local Meetup group, meet brokers, meet local investors, and provide value in anyway possible.

@Kris BensonWould I look this information up myself or should I ask their listing broker for the information?