Trees can be the root of many homes plumbing problems.
It is a more acute issue in some areas than others so keep that in mind when you look for a home to purchase.
The age of the main drain pipes leading to the sewer might be the difference between this becoming your problem sooner than you think and would like.
If you run into that type of problem, I would personally advise against using a 'franchise' brand.
Ask your plumber for a recommendation instead.
Cost will run into a few thousand dollars.
Root of plumbing problems for Concierge Mondays #4