He was involved in a local case where there was a lawsuit and counter suit.

Also be sure to purchase an "umbrella policy" for extra protection against lawsuits.

They're also one of the Real Estate brands currently facing multiple class-action lawsuits for... being what Keller Williams is.

(Link Here)I'm just trying to make sure I don't open myself up to a potential lawsuit here. 

Medical Payments (A "good faith" payment, not subject to deductible that the ins. co. could make in order to avoid a lawsuit...if you do not have this limit in your coverage, don't fret.

If someone's going to file a lawsuit, its likely they're angry and upset, whether the reason is valid or not, its likely at that point, they're looking to get every penny they can out of you. 

The only criteria I had was to look at any single-family house that had a back house/studio apartment/mother-in-law suite or anything like that.

There is a lot of uncertainty whether DPP will have the registration in place by Oct 23rd, and if they don't, what will happen then but more lawsuits against the bill wouldn't surprise me.  

We would like something else, probably 1 million to start, that would help protect us from other potential lawsuits (unlawful evictions, injury, death, etc)I’m unsure which type of policy would be best to blanket cover our on LLC and would allow us to increase our coverage as the portfolio of properties increase.

Nobody and no entity are immune from a lawsuit.