We've had a couple of drain lines from the kitchen break and dump kitchen waste under our house. It probably went on for a while, because we couldn't figure out the smell until it got so strong we couldn't take it. So, I'm concerned about having a restoration done properly.

I'm not really considering doing it myself unless an expert here can tell me how. But, if I call someone, how much should it cost... and what should I be looking for them to do?

Very much appreciate any feedback/input!