Sorry I know this one is going to be painful for many rookie investors just getting started who want to live on the beach with their mail order cash, but this is not they way investing works. 

Those all seem to be common pain points for owners.

In other words, if there was a broken leg on your property that resulted in $250,000 in medical, lost wages, and pain & suffering, if there was gross negligence on your part, the total judgement could be $1.25 million, and worse, your insurance company could deny it.So what constitutes gross negligence? 

If you sell with a "mold problem" I think you will lose more than the cost of a mitigation from the psychological impact the fear can have on a buyer.  

Just painful to think about.

examples:Baltimore - a path to never-ending pain (biggerpockets.com)Experience of OOS investing in Cleveland after 1.5 years.

If I'm investing out of market, I want to be sure the location isn't a pain to get to.

Removing tenants is a serious pain in New Jersey - though I realize those specific deals may be rehab and profit opportunities.

I do not like this as obviously if a business account is only accumulating rent from 1 property, it wouldn't accrue the cash in each as quickly as it would if all of the rents were funneled into one account.. and it makes paying the bills a bit of a pain on each of the properties as I am having things done to the properties, lawn care, etc.. constantly has me making owner investment deposits into each to cover initial expenses associated with the properties.. etc. 

It's a real pain to enforce but it's worth it.The majority of carriers right now have a loss rule on new business that varies but goes something like this... they will not accept your new policy if you have a loss in the last 3 or 5 years.