But current search functions or magnifying glass is inefficient.  

San Diego and the surrounding areas are VERY ADU friendly so there are properties with options to add one in the back that are really starting to pop there and could be an alternative option.Take it slow.

Once you decide on a specific market, you will want to narrow you search down to specific zip codes and asset classes.

Hi @Lake Bradford, there are some properties that are still available for rental and you can limit your search to those or you can consider buying and once you decide if you want to move elsewhere, sell the condo and take the equity/appreciation and invest in a home elsewhere. 

All the best as you continue your search.

Might also talk to underwriter at a lender to see what they say.Some cities prohibit wells in the city limits.3 acres is probably big enough for a well pad and a tank battery.Did you pay cash with no title search?

This is how I begin my search.

During Buyer's title search, it was identified that there is no Certificate of Occupancy (CofO) for the home confirming it is a legal 2 family. 

And I will do some google search but can I get from you . . . what estoppel means?

I found this opportunity through a detailed Zillow search I had pinpointed the specific streets in the neighborhood I liked.