Stop guessing. See the actual pipe.
A beach town's sewer lines have been through it. Sandy soil, salt air working from above, decades of service below, and in the older cottages near the pier, lines that predate most of the neighborhood. When backups start in Imperial Beach, the guessing starts with them, and every guess has a price attached. Roots is one number. A broken section is a much bigger one. The line being basically fine is the best number of all. Only one thing knows which is true, and it's not anybody standing in the yard.
The camera knows. A sewer inspection runs a small camera from the cleanout to the street, live video of the entire line, and the answer shows up on screen where everyone can see it. The roots, the buildup, the low spot holding water, the crack, or the honest all clear. Watch it live if you like. The footage gets saved either way, and no repair conversation happens until it exists. That's the order here, always, evidence first, decisions second.
It earns its keep at the big moments. Before a major repair gets a yes. Before buying an older beach cottage with its original line. Before accepting that the tub backing up every few months is just coastal living. Ten minutes of video ends the mystery, and what happens next is decided by you, with the facts in hand.
"You see the problem on screen, so the fix is priced to the real issue, not a guess."