"The Insurance companies will have the final say and they ain't gonna put a dime into rebuilding in place."
Actually, I believe you're wrong. At least on places that have a mortgage. You can fix the place, or sell it, but your insurance money is supposed to be used to fix it. We had folks out here after the May 3, 1999 F-5 Tornado that took the money and ran, but most people rebuilt. The ones with a mortgage rebuilt.
I am not an expert in this field at all -- I am making an educated guess based on the economics of the situation. Some places are potentially subject to a single incindent such as a hurricane, tornado, earthquake, etc. But NO has been exposed as inherently dangerous with no ability to redeem itself. It may be years before concrete may be laid on the ever-shifting sands.
NO is unique in it has entire (now aging) infrastructure dedicateted to keeping nature out.
I think the insurance compainies won't allow rebuilding on silt.