You might talk with a real estate/estate attorney and see if it's possible to open a probate, have a Personal Representative appointed and obtain an order from the court authorizing the sale of the property by the PR with the proceeds being deposited into the registry of the court for later distribution when all the heirs are identified. 

(Hopefully this is a CPA)If the property is cashflowing, the LLC can make distributions to you. 

They claim to distribute 12% cash return in addition to any capital appreciation after the exit (3-4 years from now).

The IRS in its Passive Activity Loss Audit Technique Guide published a sample Activity Log.  

The plan of distribution—the larger the audience to whom the promissory note opportunity is offered, the more likely it is to be found a security.3.

Tenants save money when using a shared meter, so there's plenty of room for error when calculating how to distribute the charges.

AI machines can extract resources such as minerals and food and distribute them at no cost. 

It's a great technique when you can do it.

Does anyone have experience in this market, or with this cost-segregation to write off income technique? 

One who may not know all of the more advanced techniques.