@Greg Carrier - I agree with @John Thedford that you should absolutely treat that threat seriously. 

I am currently an actor in Atlanta (in the auditioning stages of my carrier ha ha ha) so I am fairly comfortable around a camera both behind and in front.

When someone buys an iPhone Apple succeeds,  the phone carrier succeeds,  the salesperson succeeds. 

An example might be if the landlord’s insurance carrier would drop his coverage if an animal of a restricted breed were kept on the premises.https://usaservicedogregistration.com/housing-laws-service-emotional-support-animals/Don’t have any legal answer.  

The bad side is I can no longer perform my duties as a letter carrier or work a traditional 9-5 because of the degenerative nature of Marfans.

and you have confirmed with the carrier that you have coverage. their process is just different then what I have been accostomed to with pther P&C agencies.

Also some insurance carriers will only allow you to have one property per LLC.

But I'm concerned about the costs and the possibility that the insurance carrier may decide to drop the LLC's policy in the future (since they don't seem to care much for LLCs in my area, unless they are absolutely barebones), leaving me with something I paid a lot of money for to set up that can't be easily insured.I think the holding company idea makes perfect sense in theory but I don't know how necesary it is for us "small people" (I only own three single families right now).

The advantage they have over direct writers is they represent several quality insurance companies and have carriers that specifically cater to construction type risks. 

I suggest to new investors, that at the beginning of your investment carrier, to look at what best fits their particular skill sets/strengths instead of hunting for the best "on paper" deal.