The challenge
The wall between the kitchen and living room carried ceiling joists from both directions, and the house sat on a slab — so the supply lines feeding the old sink ran through concrete, not a crawl space. Houses this age also hide their surprises until demo day: undersized framing, wandering wires, drains that do not run where the plans say. And the family intended to live in the house the whole time, which makes dust control and a working temporary kitchen part of the scope, not a courtesy.