Good Luck,Kenny I'll make sure to soak up as much knowledge as I can! 

The second level features a Beautiful Primary Suite with a huge separate sitting rm that can be alternatively used as a nursery or an office, a lg Walk-in closet, Elegant Spa-like Bath w a Shower and Soaking tub.

just finishing up a cat pee soaked place.  

And by new investor, I mean I'm soaking up all the knowledge I can from BP books, podcasts and forums, as well as using the BP calculator to begin practicing my deal analysis. 

I'm just worried  that it has soaked through the grout to the concrete underneath the ceramic and that the smell will return over time,and how toxic is it?

Find an attorney that won't try and soak you worse than the tenants, hire him, and tell him politely to rip their heads off in court:) 

Sounds like I'm on the right track then, good to hear you had about a year of soaking up info.

Is it soaked into the wood?

At 10 years old I would soak up a lot of the information I heard on listing sheets, locations, pricing, remodeling, terminology, styles, etc. when our realtor would explain and showed my parents.

For a few months I have immersed myself in podcasts, blogs, and books, soaking up all the information I can.