You are looking for a "Waiver of Subrogation" naming you as insured on his ACORD certificate (this would reflect his WC, GL, Umbrella, and etc), if it is real, then you should be off the lawsuit, if he made it up, then he is guilty of perjury.

In addition to having some units insured by them they also are the provider of our umbrella policy.  

Just take out a good umbrella insurance policy to protect yourself (~$2MM or more policy usually runs less that $100/month).

If you went with that structure, you'd be paying fees the same as you would for a single LLC, but you can set up as many series you want below that umbrella, which can all be treated individually, so long as they follow proper procedures and have separate bank accounts.

For me, liability protection is not even the primary goal with putting a property into an LLC, as this could be accomplished by insurance and additional umbrella policies.

For a two family they quoted me $ 2,0009.00 for 500 K I am getting quotes to add to my umbrella shortly but that is what I got quoted here in CT 

In some states, if you are looking for liability protection, getting a good umbrella policy can make more sense than forming an LLC.

I've read here of no solution, umbrella etc to buy liability coverage for any on the job accidents. 

Umbrella policies seem to require the underlying dwelling fire to go up to a limit of at least 300K, so using that carrier would render the umbrella policy useless.

These services fall under the umbrella of brokerage.