SEO is a VERY DANGEROUS way to rely on to power your business.

But because they both  sold periodically and one deferred the taxes and used them for additional purchases there is a distinct advantage to that investor.Again, that's just one other perspective to add to the mix.  

I deny tenants with large or dangerous dogs. 

Never invest in any city on Neighborhood Scout’s 100 most dangerous cities list.Low operating cost - Every dollar lost to operating costs is a dollar you don't have to live on.

Make it seem you're concerned about the well being of the tenant(s) otherwise they may not take it to seriously.Some PD's will not get involved in civil issues if you just ask them to go with you to enter unless there is fear of something criminal having happened, or there is a belief you would be in danger by entering.

(Then there's the distinction between what's allowed and what you're willing to risk getting away with.)Do your due diligence when selecting tenants.

I have the beneficiary for all 5 of these properties as one Michigan LLC.My question here is if for example I was facing suit for one property, would the other four be in danger or does Michigan law provide for some sort of separation protection?

Many states don't even require mold to be disclosed, because not all mold spores are dangerous, and in fact, most aren't.

This is an IRS distinction.

Assuming with one property, your income from the rental passes through to you personally- in that case, there is no danger of comingling and it won't affect your taxes at all.