What options for replacing a leaking soil pipe?
Option's include but are not limited to


cured in place, where the pipe is lined with a resin soaked material and hardens in place. I'm not familiar with it but I've heard it works well.
Pipe bursting, I did this at my house and got them to pull a 1" copper line with the waste line upgrading both services at the same time. I don't know how far they can pull. Some machines will obviously be better than others. I watched a civic project and they pulled a (approximately 20' diameter pipe) nearly half a mile.
Trenching, is the simplest method but will require a massive swath of ground to be excavated. For safety shoring needs to be erected if anyone is working in the trench. If you find anyone willing to go in a 8' trench without proper shoring, I wouldn't use them.


It boils down to cost vs. inconvenience vs. quality. Also what each method is capable of doing. My plumber had pipe burst done for a customer of his. 50' under an award winning garden. In that case trenching was not an option.