I have been working on getting investors for some time, and continue to add to my network so I feel pretty confident that the investors I have already spoken to will buy into the right deal.

I'd recommend continuing to rent your condo in the interim and look for other deals.   

How long have the units been fully and continuously  rented?  

The upstairs unit will be finished in the next week or so, my plan is to continue to live and work on the downstairs unit.

It has been a huge learning process for me so far, and continues to be so.

Nevertheless, we'll continue to use it.

After my recent change in my lifestyle however, I've understood that I desire to get back to the US and continue to change my life.

Mentors generally have and continue to make their career as Real Estate Investors, not as Info Peddlers. 

Also, there are websites that offer inherited trust records or probate cases;  how do these companies access these records in all counties and be continuously updated with new cases/inheritance? 

For me making a few phone calls to verify references is not that time consuming, but I can see how it could be if my portfolio continues to expand.