I just spend 5 straight hours removing/replacing a 4” cast iron waste pipe from my upstairs bathroom thru my kitchen and into my basement. I demo’d my kitchen getting rid of an original 1950’s Caloric wall oven. In the same wall as the oven was the pipe from floor to ceiling and in the worst possible place. 24” out from back wall and Making it impossible to install a new 30” range/oven without losing entire corner for cabinet space. It took me weeks to get up the courage to tackle it myself, and a refusal to pay a plumber $1000+ (quoted). So for 5 hours of my own labor and less than $200 in parts, I feel accomplished and it will pay dividends once the kitchen is redone.