I think we should answer the questions in bite-size chunks as we go. Let's start with the camera inspection. Some companies will do it for free in the hopes of getting the sewer repair/replacement job. Otherwise, expect anywhere from $225 to $500 for an inspection and location service. If your sewer is PVC and it has broken and is leaking you may have a more serious issue than first thought. Primarily, the sewer may not have been backfilled properly. In this situation, more of the sewer will continue to shift over time and shear the pipe/fittings. It would be best to wait until the camera inspection is complete to see if evidence of 'bellies' or 'humps' inside the pipe are visible. Secondary is that the fittings may not have been glued. This could also be the case throughout the sewer and leaks will continue to get worse as supporting soil is washed out from around the pipe. Again, let's wait for the camera inspection before drawing too many conclusions.

I would call around and get 3 estimates, no use paying a plumber to camera and locate a line if they dont get a job, even though the floor is marked, the new plumber doing the job will tell you, ill dig it up, HOWEVER if the problem is not here, i cant be responsible for xtra cost... try to get each plumber to camera the line for free in hopes to get the job, just be clear on this to them, tell them money is on your mine (be polite) and in most cases the plumber will help you out. good luck with your job, and remember the small ads = lower prices and the BIG ads = BIG $$$ Good Luck

The most common reason for under slab drainage leaks that I run into is damage, usually from the concrete contractor driving form stakes into the pipe. That said, it would be real hard to give an estimate for time or pricing on something like this. There is no way to know how many leaks you might have or where the leaks are located. It might take considerable time with the camera to even locate the leak, or it might be located on the first trip down the line. And then there is no telling how long it might take to get to the leak and fix it.