I may have already commented on this, but we had a similar experience. With virtually no assessment, they told us the
only way to find what was wrong was to spend $3000 to dig up the floor and a small section of pipe.
As it turnred out, they never camera-ed again - they just came up with an even higher estimate.
When it became clear they were lying about pipes themselves (and at one point took the length of pipe away so we couldn't see it), we called in two second opinions.
There was nothing wrong with any of the pipe - they dug it up for nothing.
Now, we're naive about plumbing and we've now had this kind of fiasco happen twice - but we're learning. They did not do what they said on the estimate they were going to do - and they didn't fix the drain in the most inexpensive, necessary way. WHile they brag that they never do unnecessary work, in our experience, that's all they do.
We paid $40 to have it snaked tonight - we'll get a videotape to support our claim that the pipe was find, on Monday.