There are a lot of great authors out there on apartment investing.  

If you are referring to a different book, who is the author?

He is the authority when it comes to the Residential Assisted Living Business. 

All they care about is who's the trustee and do they have authority to sell the property. 

And you can always require your renters to carry renters insurance.2- Landlord tenant law is state-specific, so you would need to research codes or reach out to the state real estate authority or your local metropolitan housing authority (MHA)....they are usually a good resource.You would need to check with your county auditor to see if there is a requirement for a "rental registry"...this is county specific...or could be related to city ordinance as well.

So I called the attorney who has the files to see if he has been given executor status and was told:1. it's an old case2. he does not have the authority to sell the propertyThen I called the courthouse to see who is the administrator over the estate, and was told that they have no record of the mother's death! 

We don't have any housing authorities with moratoriums. 

In this scenario you would do your normal screening on the new applicant, and write an addendum to add them as an authorized occupant.If you feel comfortable releasing the tenant from the lease you can write a new lease with the new parties and transfer the deposit to that lease. 

I believe you have to start with your local housing authority.

The tax credit (Low-Income Housing Tax Credit) program that you mentioned you would be able to get information from your state's Housing Development Authority.