Watch out, some tree roots may be stronger than the rooter used to clear them, in which case the rooter company may end up with a rooter trapped in your pipe, as happened to my parents. Ultimately they had to get the sewer line excavated and replaced where it met the city sewer, 15 feet down in the middle of the road. Cost like $30k.

Maybe ask the rooter company what happens if they end up with equipment trapped jammed down your pipe is all I'm saying.

That to me seems like something that should be covered by the company's insurance.

Any services company that comes out, ens up with breaking their tools because they used inadequate tooling, and causing more damage? I don't know how they managed to foist that on to your parents.

The issue wasn't the tree roots, it was the rooter company's poor investigation. Video scoping a sewer line is trivial these days.