I have read I will need to use a third party service to make this happen.  

Future enhancements include the planned Silver Line rail alignment with nearby stops, as well as potential commuter bus services, pedestrian paths, and bike lanes.The development benefits from proactive rezoning by the city, transitioning the land from industrial to mixed-use urban development.

I suggest using a service like Mayistay.

There are companies such as Cover that offers a full service ADU deliverable from design through construction completion.

There are lenders out there spending a ton on advertising with an army of correspondent's funneling them loans and many can very well be one and done borrowers because the loan servicing/construction admin is lousy. 

And yes I would recommend my services :) Hey @Donald Hatter!

So, in actuality the divide between “good” PMs and “bad” ones is probably no different than any other service provider, be it real estate broker, mortgage originator, etc.The key word I has in my sentence was MAY; as in MAY be hazardous to your financial health.  

Is there a certain direct mail service they prefer?  

We have every one of our managed properties enrolled in these services to avoid utility shutoff damages.

If a person has to ask, at all, I STRONGLY advise to use a PM service for tenant placement.