Learning on the fly how to operate this business without bothering to learn the laws is the root cause of the vast majority of tenant problems.

Why not go back to your roots and invest in Rowan?

Tenant shall be charged for repair of drain blockages or stoppages, unless caused by defective plumbing parts or tree roots invading sewer lines.

I'd charge them for the repair.It it were intrusion of tree roots, no.All of that has to be tempered with what your local laws allow.I'd say that you need to pay upfront and then make your determination.

Dan Wire was excited Mr. Tom Henry the mayor had finally accepted his invitation to meet him and his wife on his boat for hors d’oeuvres and wine. Dan was optimistic that he could possibly convince the mayor to let hi...

One of the best subjects to be well versed in order to understand the root causes of "market cycles". 

to quote the movie "the rules are more like guide lines anyway".Their value is at the boundaries; being too low or too high and you should pause to ponder "what did I leave out, misunderstand, or is this truly a bad deal" and that's the root of your question.  

Need more details -- I could only rationalize $300 if the pipes needed to be snaked all the way to the sewer lines because of roots and other obstructions.

I plan to move to San Antonio, TX this is not a rash decision I have been looking and watching the market there for about a year and since no matter where I go when I get out I figured why not root myself where I want to invest.

@Michael Root could you please clarify your question?