Anyone Ever Replaced Their Own Sewer Line?

[David Healey]

I just bought a house without scoping the sewer main. I know, big mistake, I agree. As it turns out, the kitchen sink started having trouble draining. I am going to get a plumber out to clear the blockage and blow out the line. If it needs to be replaced, I don't want to pay the $10k-$15k to get it dug up and replaced and so I'm considering pulling permits, renting a mini-x and digging up and replacing it myself. I have dug up and replaced a water main, but I realize this will require a deeper trench. Has anyone else ever done it? What advice would you offer before I start this adventure?