[pestigor]

I'd use google maps to look in the neighborhoods around Tulane and Loyola.
Check out Versailles Blvd north of Tulane's baseball stadium and Fontainebleau Dr west of Versailles east of South Carrolton Ave.

The main issue is the Southern Gothic Mansions are mostly on St. Charles itself.
The Garden district (and most of uptown) is just so expensive that every shotgun house there rent's for an absurd amount of money.

I think, unless you're running a game for locals you can get away with some poetic license. The simple fact is that area is taken up by long time residents or student rentals (which inheritors of long time residents realize they could milk for loads of money if they rented).

I've lived 10 minutes away from New Orleans for over 47 years and used to gig in every dive bar uptown in the early to mid 90's.