I am already aware of different firms (both local and national) that provide this service but was hoping to talk to someone from the end users point of view before sitting down and talking with a professional.If you have done a Cost Segregation Study and are interested in talking over a beer or coffee please let me know! 

Most of them are decent firms.

Once you start making calls and researching a bit you will start to see which firms are top notch. 

@Travis Weitthoff - I was wondering the same, the seller is a firm that specializes in developing and stabilizing multi family investments on the South Side of Chicago, so I'm going off the assumption that the numbers they gave me were from last years actuals, but not positive.

I suspect the market to take a turn during the next reelection (Ray Dalio and alot of PE firms suspect the same if not sooner) and plan to purchase alot of properties and lots subject-to on the coast.

If that doesn't work then meet with the tenants after the sale and go through the lease, be nice and professional, and let them know you are going to improve things but be firm on the terms of the lease. 

the good management firms tend to specialize.

The lessons that I learned the most, were to be firm with your rules, and definitely follow tenant screening, and don't take crap from contractors.

Often these management firms have interested applicants from other properties recently listed.

If you are going to do that you have to be ALL IN and go work for a firm that focuses on tenant representation for commercial clients.