Is there anyway their hairs, sons/daughters, 20 y/o “husband” can become protected tenants upon their passing?  

I know that is probably just a normal and natural part of apartment living, but there is very squeaky floorboards right above the tenants bedroom, causing her sleep to be interrupted very early in the morning when my tenants has to wake up for work. particularly bad areas.

My goal is to do rentals since that's passive income nature.

@Andy Lanyi, It's going to depend on the nature of the trust and the desired LLC. 

Sometimes you can tell because of rust staining and buildup on the outside of such affected pipes,   but even without that they can be weakened considerably from their original state.On the drain side galvanized branch drains  (1.25 through 2" galvanized pipes)  can also rust out or clog up as the rust on the inside is very rough and catches hair, grease,  and other debris and will eventually need aggressive rootering,   which if the pipes have rusted enough may open up holes in them.I should note CAST IRON (hub and bell) old sewer pipe,  at least the 3" and 4" stuff seems to have a bit longer lifespan than galvanized steel;  it still rusts but doesn't crumble and flake and encourage blockages like steel does,   so an old house with a cast 4" sewer stack you may be fine for many decades more if you just replace all the branch lines going into it but leave the main stack.   

I have worked with clients like this in the past that have come from other lenders that were told that you could not qualify. 4 out of 5 lenders will say they can't do your loan due to being transient in nature.

What's the nature of that LLC, what's it used for currently?   

I'm not trying to rain on anybody's parade, but anyone who follows advice that is that general in nature and tries to do one of these, by advice from a post on a forum, is sure to find themselves discussing the deal with a nasty attorney on the other side of the transaction and in a very formal setting called a court room.I can not tell someone that you can climb into a piper airplane, put the key in the ignition and hit the gas and you will be flying.

After Katrina, those areas were returned to nature and redevelopment focused on areas that had done well during Katrina. 

He also had gray hair and a few decades under his belt.