With the numerous investors on this forum they have done this to, it is probably just the tip of the iceberg. 

There are numerous reasons why they usually do not make good rent properties. 

The real skill is understanding the variability and risk in each number which is not always numerical or scientific.

I can find numerous other similar homes for investors.

Search the BP for ADU appraisals to encounter numerous examples.

The investor “gave up” after numerous attempts to sell the lot or get a “refund” from the county proved unsuccessful.  

You have numerous funding options so pick your poison.

It was an office building owned by a somewhat shaky business, but did have numerous long term roof leases for wireless providers.  

My core investing philosophy is pretty simple, and has done very well across almost two decades and numerous cities:1) Invest in cities with population (and job) growth2) Invest in parts of the city where household income is near the median (or slightly below)3) Invest in properties that provide cash flow from day 1 Thank you for sharing that. 

If they don't answer my questions, I know they have not read the ad and are just clicking and "tire kicking" or they lack the intellectual focus for me to have any business relationship with them.