Recommendation for full underground plumbing replacement company for slab on grade home? Preferably one that isn't going to charge near $20k for a house with 2 baths, kitchen, and laundry. That price did include main line from house to street. They had to tunnel approx. 30 ft. total to get to the baths. Kitchen & laundry were on outside walls. Was it fair or did we overpay? Thanks in advance!