is this typically part of the landlord tenant act, city, or some other agency?

Are there agencies where I can hang my license and function like this?

If they are able to get agency debt then you know Freddie or Fannie thinks the deal has a very high chance of success (Freddie has not had a single deal anywhere in the US go south in 3 years). 

We closed at a local (to us) title agency.

There may also be a state or govt agency you can reach out to. 

I also own my own insurance agency.

Cody,The guy who used to own the agency I worked for did exactly that. 

It will strengthen your relationship and produce remarkable results for you both.Don't sign an exclusive buyer's agency form and let each REA know that you are also working with other agents.

We get calls from agencies like the one you are describing all the time for our rentals we fill here in CT.

With the exception of places like "guide dog for the blind" and other agencies that train true service dogs for the physically disabled people there is essentially no governing bodies or qualifications that have to be passed to get labeled a "service dog".