Basically, as I understand it, all the new development has eaten up former prairie areas that used to soak up the water.

Does this new tenant take longer, hotter, soaking showers or baths?

I think you can get one that resists soak-thru of fluids.

Did the seed sprout inside.  

Seems like it soaks in..

Trouble is, many PMs out there don't know the difference and the owner gets soaked. 

Make them think you're giving them a huge favor, in exchange for a spotless unit, and you'll have far less to do after they move out.No need to soak them.  

Not to go too far afield from the original question but this town is different from any other towns with trains because we are  our own little slice or paradise...when you throw your line in the ocean you pull out a plump tasty fish and when you scatter some seeds you grow our own special datil peppers to make a tasty hot datil sauce to brush on your tasty fish...and then throw some oysters and clams on the beach fire grill...we have oceans where you can surf and skim board and Intracoastal where you can Kayak and windsurf  and marshes where you can see pretty pink spoonbills and historic streets and buildings where you can dress like a pirate and drink rum and go argggg....when you can live here NO ONE I repeat NO ONE wants to live by the tracks...so to the original poster I say I would NOT buy anything on the railroad tracks ! 

Tell him you don't want the interest, but just thought you'd try to save him from someone that would soak him for 2X the deposit + court costs over a dollars worth of interest.

If it soaked into cheap laminate you will probably need to rip out to get rid of it. https://www.youtube.com/watch?