It doesn't take all that much for the drain to get backed up. We do OK by letting virtually no food particles down the sink, but invariably it backs up now and again, particularly when we're hosting. The only way to unclog it seems to be to use an outdoor clean-out in conjunction with a ~50 foot snake.
The house was built in 1995 near Dallas, TX; the kitchen is on the first floor and there's no basement.
Are there any good options here? Could an endoscope reveal anything useful? If it is the wrong kind of junction and I wanted to attempt a repair, how would I even find where this particular junction is? (Presumably, I would need to bust up part of the foundation to repair it, which makes finding it trickier) Would it be easier to invest in some kind of super garbage disposal, e.g. one that shreds food particles more than just forcing them down the drain?