I am only inquiring so that if I should ever entertain another property I could avoid a repeat of this unpleasant situation.

You said getting new tenants is not a problem, so unless it is an unwanted hassle to that's probably your best option.You do away with the maintenance and upkeep of the machines, the utility expenses and if you're right about neighbors using the laundry reduce the traffic onto your property which can only be a good thing.

Unpleasant but very straight forward.

So the real question on my mind is not how effective are these services at triggering a response, but why any of us would want to build a business already walking a thin line of legality and generally unwanted by 70% of the general population? 

Try not to follow me, though - unless you want unwanted advice on meth labs, cheap wine and public records. 

Much worse, I got a total of four unwanted contacts, including a robocall, from Cameron pushing his other services, just in the two days it took me to block his numbers and email addresses.

What I mean here is that blight of anykind, in any shape or form, serves as unwanted attention and these details can become overwhelming to one's senses. 4) Neighborhood IQ: Let me say it bluntly that most often people follow the path or trajectory of how and where they were raised.

No unpleasant surprises.

Of course it an unpleasant and beyond once control but thats business and have to pay the mortgage.

Rather, the solo 401K should own the LLC's so that all taxation goes on within the 401k and not be flowed down into the S-Corp where it would be subject to unwanted taxable events.