Leave old New Orleans
It’s dumb to recover the old New Orleans. Abandon old New Orleans and start a new city on high ground. The cost to recover NPOSI and Old NO will be staggering. With graft, politicians and shady construction companies it will be mega-billions of $. It will never be like it was before.
Take the current New Orleans, rename it to “Old Orleans”, demolition it, start a new city on higher ground and call it “New New-Orleans”.
The old one was a rat hole anyway - there are big rat in old NO. It’s insane to keep it below sea level waiting for the next hurricanes to come in. This could eerily happen in the next 2 months - more tropical depressions staring up right now.