Buying a partially built, new construction home: pros and cons?

[Renee Yarbrough]

I'd like to buy a partially-built, new construction house that has a concrete pad, roof, outside walls, windows, and inside framing. No electric meter, wiring, plumbing or inside walls. There is an architectural drawing that comes with the purchase. I've never taken on a project this big, and am wondering what the hidden costs would be, the potential downside, and any costs/time delays I wouldn't think about.