As others have commented, this is a scenario where you will have most luck with a private individual lender or some other local financing - just too small for pretty much all the national platform hard money lenders

Highly unlikely except in a probate or estate type of scenario.

Does anyone know of a site or common place to meet investors and rehabbers to make a deal with.

And even IF there are violations leading to enforcement, the most common type of enforcement action in these violations is that the accused doesn’t admit to any wrongdoing but agrees to never do it again, LOL.  

Well said Jordan, it's not as common in this market to have an ADU but there are some out there.

Are these common now?

However, these are the ones most commonly used:Five-of-Ten-Year Test: You must have materially participated in the activity for any five of the past ten years.500-Hour Test: You must have materially participated in the activity or activities for 500 hours in the current tax year.Step 3: Calculation your participation hoursEnsure you are tracking your participation hours.

I enjoy helping new investors avoid common pitfalls and use loopholes to build their REI portfolio.

Is this a common trend? 

That's the best case scenario.