as stated some of the common income producing real estate activites that do not include rental income1.

Your first deal might need to be a house hack in order to use the FHA loan, but you will be surprised how quickly a year goes by, which is the FHA requirement for occupying the home.Lastly, if you find yourself having trouble getting anyone to give you a credit card or loan, consider a pre-paid credit card. 

I would connect with an attorney immediately so you are going through the proper steps to get the unit producing again.

I own one rental property in my home city that is currently producing a small cash flow.

These lumber producing companies were trying to ramp production up while creating a safe work place because of COVID-19 and for some employees it made sense to stay at home because of safety reasons and/or unemployment benefits. 

Furthermore, the income produced by airbnbs can be considered business income and not rental income. 

Bad deals waste time, waste money and not only don't produce profits but can lead to bankruptcy.

All my extra cash goes into the company stocks and I don't save any substantial cash.I'm not really sure on how to calculate the ROI of this type of investing, but the re-invested dividends produce about $300 per month (currently) and the amount increases about $10 per month on average.

The time/cost associated with turn overs can be more trouble than it is worth for the small amount extra you get on medium term.

Specifically, I am wondering about the income that the ADU on the new property will produce, and whether it is considered the same way as the rental income on a multifamily is.