If there is ANY possible way it is caused by tree roots, have him put the power rooter on it with the knife sections that scrape the walls. 

Could be tree root,  a clog, might need more slope, etc.but don't worry!

Rooting for you to complete this one before year-end.  

We offered her the ability to move to the vacant apartment which is the same size, but doesn't have a bedroom window, but otherwise all 11 units are identical.Since discovering the root of the problem with the shower and it's lack of plumbing, she sent an email to our PM and again demanded a months rent and threaten to contact the inspector.Looking for advice on the situation.  

I'm sitting on cash and am rooting for a downturn so I can have an easier time buying more deals. 

It used to be very ROUGH....but during the 1990s and 2000's there was a grass roots effort to "take the neighborhood" back from the gangs that had overrun it.

Peculiarly enough, the fact that my wife is Russian with Ukrainian roots and that we recently decided to become involved in refugee resettlement has also thrown open doors for us I wouldn't have expected -- Pittsburgh has its problems, but it also has a a long, proud history as a city that welcomes those fleeing wars and oppression.

I suggest asking yourself "why" 5 times to get to the root of the desire to invest.

Many times underground pipes burst due to age/decay, normal wear and tear, shifting clays/foundations, freezing, or because of a tree root. 

It's always best to try to see if you can work with your existing buyers and get to the root of the problem if they cannot pay on time.