But, I have seen a lot of negligence too.

I've read a lot on NOLO that, in my state (Georgia), I am personally liable for all negligent acts I perform regardless of how my LLCs are structured.

We have been incredibly negligent with where money has been spent in the past 3 years.  

And their position is that they aren't saying its an estimate, rather the number is representative of a made up word that is very similar to estimate.Its useless, and because of that Zillow is negligent in presenting this to a marketplace, for which it is an authority, that doesn't know any better.

. - I parallel your thinking in that one single deal makes the all the cost associated with being a broker negligible. 

To offset they may carry a $25-100k deductible as the know tenant negligence is covered by a separate policy.

I have had pets all of my life practically both cats and dogs at various times.I find most of the time damage to a unit is actually the negligence of the renter and how they care for their pet.

Costs can spiral out of control if you're found negligent for someone being hurt on your property.

In some cases the cost is negligible.

Most of those dollars will have been spent on INTEREST alone, giving you negligible equity!