Periodically I take a look at mansions on the market and the realtors may note how long they took to build. We're talking about multiyear projects because of all the needs I mentioned, and I forgot to include scheduling for inspections of many things.

This isn't like throwing up a particle board framed dimensional lumber frame house. It's a works project with so many things like foundation digging and pouring, structure erection, walls, plumbing, electric, flooring, roofing, cabinetry, painting, many areas with required inspections. Big houses take long times.