Doing a kitchen tear out, after removing my cabinet I realized my drain and supply lines are currently running behind the corner cabinet and into side of the sink base cabinet. Currently my old copper drain line for sure needs to be replaced as it's dripping. My new corner cabinet sits 6" off the wall so the current plumbing could work with the exception of the drain replacement. Just looking for opinions, my floor joist are 2x10 and I've got subfloor cut out just need good advice. I do have a plumber coming but the normal one I do work with got pulled off my job and his son is coming so not sure how I feel about that either. I guess my main question is leave it and just fix drain going out or change location of drain and supply lines? What would be the better or correct way? If that makes sense.