They don't tell builders "give me a house, I want turrets and a fence and 23 bedrooms, 4 bathrooms and I want it done to a really high finish by next week".

Instead they get a detailed, industry standard, multi-stage plan that has everything they need to start, as well as access to an architect that can check on their work and when things go wrong a process for change management is included. And no-one expects a house to be built well over a weekend.