ADUs adding value and ADUs adding more value than they cost are not quite the same thing.  

By no means am I a millionaire or did I get rich quick and quit my day job right away.

@John Hickey quite the story and looks like everything worked out in the end (easier said then done right).

Thank you Eric.In addition to the rental properties, my wife and I have a paid off house, paid off car, and about $1.4m in retirement accounts, brokerages, and savings.We live in a HCOL area and our expenses are $9.5k per month even though we live pretty modestly.I set out initially to have real estate pay for at least some of my expenses in order to give me more freedom and financial security.Is your wife quitting too? 

And even if the tenants chooses to stay in your property for 2yrs, the damage they may cause will eat away all of your cash flow and leave you potentially upside down.

How do you eat an elephant?

@Michael Schnell is quite right.

Business should start to extend only because there is nothing left to eat in the market not because you are losing in the competition. 

That is what I am trying to figure out, "what is the problem trying to solve" I view this as a problem for the current owner - who wants their cake and eat it too.

If you can wait on the cash flow I'd consider a sydication or something more passive if you aren't looking to be quite  as active.