If you're only planning to represent a few deals per year, you probably won't reach a company's cap and want to look for brokerages that have low commission splits from the beginning.Make sure to figure in monthly desk/brokerage/E&O fees when shopping around.

CPA, attorney, company that provide such service?   

Very efficient.Chances are the older system has substantial duct loss and should be tested.Mini splits have their place but cold air is heavier and drops so the bottom floor doesn't make sense.Electric motors do not raise in load consumption as they age, it's the mechanical work done that raises load, typically deferred maintenance on belts, shives and pulleys.I'd disqualify HVAC companies by asking; Are you proficient in the new Manual J,S & D standards (that will be required in the industry moving forward)These companies will understand laminar flow, stratification and static airflow imbalances that have a great effect on efficiency, operation and longevity of a conditioning system.Get 3 estimates, compare scope & make sure its permitted.

Or pull a list of these companies?

I think a big thing to consider is what socioeconomic tenant base you can deal with, and if you can self-manage or need a management company.

Point being if you Arlet say part owner of a company it wouldn’t it be better to pay yourself than a contractor.

Get a good tile company with reviews and references you can trust. 

Called my county recorder and clerks office in Phoenix Az and asked for the records of people behind on their mortgage filed from the mortgage companies and they didn’t really know about it.

Likely best to just take care of it yourself, trying to get that taken care of by the insurance company might be tough

Sounds like a turn-key management company that isn't crazy expensive so returns are still solid, or am I mistaken?