This can vary depending on the local Public Housing Authority’s (PHA) workflow and the timing of inspections.5.

For example, electrical is original from 1960, there is no central AC - heating it through baseboard heaters

Begin with do you gave a participating housing authority ( HA) in your clients area? 

Hi All,I am looking to convert the basement into an ADU hence I will need to interact with local authority in order to obtain the building permit.

The parent LLC will have an umbrella company agreement or operating agreement that will state the company is authorized to create specific series. 

The best way to build relationships with cash buyers is to establish yourself as an authority in this space.

I have a 3 family under contract in central, MA. 

We have SFR, some limited number of townhomes and condos, and large apartment complexes. 4 plexes are pretty rare here except in the older central part of the city.

Further, a state that an entity does business in but is not organized in or registered in can declare authority over that entity due to the entity being a “foreign” entity doing business in that state.  

Usually as long as their are no life threatening issues (no HVAC, windows won't open, no hot water), the housing authority will began to pay the rent and give you time to address the required repairs.