As a person with extensive use experience of such, I will say at worst would take maybe as much as 1hr to track an heir, emphasis on "an" as the correct tool in this arena, or more specifically the one I used, I could dig up the last 30 years of a persons history, every address, co-habitant, everyone in 1 degree of separation, there 30yr residency/ work. sphere and so on and so fourth. 

However, don't forget to look within your own sphere.

The last date you can invest in OZ is the end of 2021.

Hello,Can one purchase a condo in an OZ for tax deferral?

You should not count on that coming from the OZ investment. 2.

You can invest more than the capital gain realized if you wish, but the interest will be bifurcated solely for 1400Z-2 purposes and only the interest stemming from the qualifying investment will be eligible for the OZ tax benefits.All capital gain: LT cap gains, ST cap gains, 1250 gain, and collectibles gain are eligible for qualified treatment under 1400Z-2.If you are thinking about a QOF investment, I'd advise you to onboard a competent tax professional as an external partner on your team. 

Just building in an OZ ZipCode isn't sufficient.  

Create new relationships and continue to build on the existing ones.As an agent, the main leads you want to focus on are the HOT leads (FSBO and expired) and the warm leads (personal circle/sphere of influence).Focus on speaking to as many people within a specific time block each day and do it consistently.

I have worked hard to develop a sphere of other brokers and investors to share my upcoming or pocket listings with.

Where is your sphere?