The challenges stem from cautious equity investment and local opposition to these developments, which are believed to attract large families with school-age children.

The biggest issue with ADUs is small units in small count is very expensive development.  

Hi, I am attempting to develop something similar to this on an R-5 lot in Atlanta.

Assuming you narrow it down to 2-3 areas I would then speak to several property management companies and/or investors to develop you 1-2 target markets.

Once that deadline is broken, I do not give that same renter another chance.You need to really think this through, develop a policy, and run it by an attorney to ensure it is legal and makes sense.

A few things you may want to check are growing population, infrastructure development, growing job market, affordable property prices, and rental income. 

You might want to think about pulling up the carpet and taking a look. (2) Maybe the water delivery piping under the floor, hot or cold, has developed a pinhole leak and is spraying onto the subfloor from below. 

I myself am a value-add investor that likes projects other people either ignore or can't handle, but are too small for the developers.

He is a commercial real estate developer as well as having built and owned several multi million dollar businesses and has owned residential rental properties as well.

I am not a developer per se but I was in tech field as a project manager/ business consultant.