In order to find, agents and lenders.

Generally larger commercial properties and shopping centers are easier to classify with hard and fast rules, but to the points above the residential areas really move very quickly and have way more nuance than most people care to admit.zip codes are generally way too large for my liking at least in my market to provide any kind of insights other than macro level economics but even then highways or rivers that cut through a zip code can end up with totally different trade areas.we can get pretty granular with cellphone data and with grocery center data to understand the trade areas and their true boundaries, but that kind of data pull is generally only cost effective for investors doing larger scale projects or developments, and honestly we still just end up getting on the ground and feeling it out, so I generally tell people that the money is better spent on a plane ticket and weekend trip in the area you are looking rather than any kind of "trade area" level data studies.and generally B class in 1 area means something different than another. 

An additional benefit of a detailed engineering-based Cost Segregation Study is that it can increase potential insurance premium savings as well as provide support for the property tax appeals process.

Do you have recommendation on Agent who can do this?

If you want to be an agent focus on that.

The reality is the opposite - if it's not in writing then the PMC doesn't have to provide the service or can charge extra for it!

I know becoming a part time agent is one way, but where we live in south Florida seems to be overfilled with agents and I don't think its a great fit for us right now. 

Educate yourself on the local market, network with other investors and agents, and always have a solid plan in place before making any investments.

We have allowed tenants to resolve past due debts or provide letters from previous apartment complexes confirming that damages or unpaid rent were not their responsibility.

And it doesn’t matter if it’s CA TX  ID AR or FL Subject To can be done SAFELY, out of state, too.More info at the link provided by Bigger Pockets, just below.