We just had a giant lawsuit that showed how difficult it was to negotiate the fees, and the steps realtors took to prevent buyers from easily doing so.

On the contrary, business identity theft is as real and as difficult to detect as it is to stop.

Philadelphia, which is where I invest has a number of neighborhoods with similarly priced housing where its difficult to operate SFH's and even multi's for the same reason.  

House-hacking is difficult.

My wife is in the same situation with her father's estate and it has been difficult to find someone. 

If so, it's going to be difficult -- especially managing this from a distance.

Quote from @Makan A Tabrizi: Tenant B sounds like a difficult person, so you may be better off getting rid of him.

Someone I spoke to today mentioned the possibility of reopening the foreclosure to include the MDH and possibly resolving the unknown heirs issue - but from my understand that's rather difficult to get done, but if possible it might be the most straightforward thing to do. 

It can be a difficult conversation but that will provide you with real and transparent advice that people on BP can't really give.

Bills like this are difficult for tenants to budget and create messy scenarios when someone moves in/out around the timeframe of the bill coming out.