I think he's got it... may be worth exploring (I don't work for Brad in any way, shape or form).What you have my friend is a classic example of "The Elephant & The Mouse Relationship".  

My name is Mat and I am from Fort Worth, Texas.  

Sometimes "Magic Eraser" works well on vinyl, plastic, and enamel where other cleansers fail.Consider that the next tenant will also put down a bath mat and cover it up... problem solved?! 

@Mat O'Grady thanks Mat!

We even have gotten calls from fliers we posted in laundry mats.  

You will also want to provide them with the mouse traps and/or set them up your self.

I wanted to summarize all of the great ideas submitted though, below is a summary-- Put them on Craigslist from @Mat McCourry- I liked this one I ended up not getting any good hits but always worth a shot.- Just Crush them from @John Arendsen- This was a hard one for me as there is perceived value still left in the trailers but it will not be worth rehabbing all of them.

Hi Jay,If someone is conducting professional real estate activity without an active license OREA can issue a civil penalty ORS 696.585/ 696.590. https://www.oregonlegislature.gov/bills_laws/ors/ors696.htmlYou can also look at ORS 696.301 under grounds for discipline.I followed up with a big wholesaler I had lunch with today  OR should I say flipper because he actually buys at courthouse then flips.. he thought there was no monitary pentalty but there is a modest one.but if the DRE in our state thinks its agregious you can see in these statutes they can take whatever PROFIT a wholesaler made as well as a fine and your legal fee's and your cease and desist.again thought I really think this is state specific.. some states they could care less even though your breaking the law others like OHIO FLA CA OR NV they will enforce I don't know about others though.so for those that teach assigning contracts or selling real estate you don't own in any manner and saying its legal in all 50 states that's just not true.. and again I just did this little bit of research that took me all of maybe 30 minutes to find out.. but my state is pretty nice they will e mail you back.. maybe other states just ignore you.. but I would not rely on attorney only.. as I stated that has cost me a bunch of money.laws are at their base also opinions and an attorney can have one opinion and he is write the state can have another and they are right but who wins  I think we all know the answer unless we are Google or facebook and want to go to the mat for it.. or like UBER who just steamrolled the taxi laws.

If you give a mouse a cookie...

Inside there are holes in the roof upstairs with water coming in, very questionable flooring and sloped/uneven surfaces, mouse droppings everywhere, etc.