This is a fairly common issue with older properties  where root structures create a dislocation in the line causing constant backups and the only remedy is replacement.

A professional foundation inspection to determine root cause and verify the neighbor is at fault.

Now, there may be baseball and basketball (rooting for the Maloof family).

That will solve the root cause.

If it is a more recent situation look for the root cause and try to figure it out before you let them go. 

Most use what's called a Veeder-Root system for that.There are/were quite a few single-wall stainless tanks in use. 

I also did a sewer scope as well that showed that the roots has gotten into the sewers and needed to be replaced immediate.

I don't do root canal on myself either! 

Personally in my experiences we have worked with many Section 8 tenants and we have learned to be able to as you stated screen them a little bit better and root out the good from the bad so that you do have a good experience with a Section 8 tenant.

I also did a sewer scope as well that showed that the roots has gotten into the sewers and needed to be replaced immediate.