For example, I had them take messages and email them to me for pretty much everything except no heat calls or active plumbing leaks.

But works via wi-fi, sends the data to a dashboard for you to view, and monitors leaks.

Horror stories of leaking water leading to skyrocketing water bills soon follow.  

eventually they rust/corrode and leak. 

Based on experience, does anyone have a rough estimate of what it costs to repair a plumbing leak in the center of a single story slab house?

And keep in mind you may be able to address the specific area where the leak/break is and not necessarily repipe the entire thing. 

@Shawn H.Most likely cast iron, could be clay or PVC.Problem will always be finding the exact location of the leak and having to jackhammer through the slab to fix the problem.

Look for and replace leaking drains, shower heads, toilets, or anything cheap that's going to cause future issues.

However, in this case, I'm prepping up for an out-of-state rental and trying to avoid getting a sewer line/gas line leak from the sunken side breaking off from the rest of the slab a few years from now (PS: I will not mind if you think I'm being too anal). 

I had a roof leak that took a while to find because it was coming from a plumbing stack roof penetration much higher on the roof.