insurance is wind and hail for $3000 to $8000 depending on the size and type of house, age, updates, and many more variables
Flood insurance: as low as $350, and as high as $5000...once again...depends on the specific property..location, location, elevation, location. Did I mention location?
There is no one number for what you are looking for.
Sounds like you need a Buyer agent to help you.
Start with this link and watch the video:
To get even more pertinent information specific to New Orleans click on the link below
Or as mentioned below, you could work with a buyers agent who is well versed in the area you are interested in. He/she will do the legwork for you. I would not purport to advise you on something uptown or in the quarter, but if West St Tammany is on your radar I'm your resource!