One tip is to start looking into meetups to connect with investors / others in the REI game (in person/online).

It doesn't matter how long it takes for me to get back rent from the US feds.

You should be able to send it to the court clerk with the case number (you should be able to find it online or call the court).

please send me a case example I'd love to read. that's one appraisal. the knowledge I have as a licensed general contractor working with investors from 5 cities at a time all over the country buidling 3 different floorplans I would say trumps one ADU you read about online 

Always validate what you read online, things change, I could be wrong, but use this as a starting point in your research.What Is an ADU?

Any information of how to pursue the matter with them.

.: If as you say, you're not considering this in a vacuum, then why even single out cash flow or single out anything for that matter?

This may be because (1) until recently interest rates were trending lower so if the lender is getting a higher rate on subject note than he can obtain on new note there’s no monetary incentive to call the note (2) in the past technology did not exist to identify the property transfers (ten years ago county recording docs were not online) and (3) the lenders rather collect payments than own property.  

Maybe self-accountability does matter. 

Non of us, no matter how experienced, have a crystal ball that we can look into and see the future outcome of an investment.