It was recently rented at $800/month, but it is TINY (400 sq ft).

The city I'm in doesnt even allow tiny houses.

If they moved themselves, I would contact a local moving company and ask for a rough bid to move a family of this size or a household of your size and then offer that amount to the tenants.Try to deal with them directly and nip this in the bud.

Even if the heavens align and you pull it off where everyone is paid and you make a tiny profit they will expect it again the next time over and over.

Household dehumidifiers will likely be insufficient for this -- you'll need commercial grade equipment.To prevent a repeat problem in the future:  I live here in Baltimore and based on what I saw yesterday, I don't think a sump pump will prevent this from happening again. 

Otherwise, savvy "professional tenants" will wait until you file a dispossessory suit on them, and then make a tiny token payment.

My wife's tiny little home town in West Texas suddenly got a big boost as they found a bunch of oil nearby the other year and suddenly all bets were off.

Find a partner and bring them the deal, take a tiny cut, learn from them and actively repair your credit.

On the list I can see that the delinquent taxes are ranging from a few cents and up to about $6k (only 1 person this high), I am new to this but I imagine that these are tiny numbers as compared to what some of you see, I just happen to live in a very small county in middle TN.

In Arizona they just allowed, Tempe, to allow a plot of land to be used for "tiny homes" in an effort to promote affordable housing.