What about something like the Palmetto Bowl in Columbia, South Carolina in Brice-Eckles? Charleston would be a better location but what would be the largest stadium? The Citadel?
Would be in a warmer location and in the Sun Belt footprint.
When I lived in Chucktown six or so years ago, there was talk about having the Palmetto Bowl there. It's was rumored that ESPN was pushing for it. The sticking point had to do with the renovation of the Citadel's stadium. To get the bowl, they had to increase the seats significantly, something the Citadel didn't want to do.
There were also some rumors that the whole Confederate flag issue was keeping it from happening. As they say in Charleston, "Keep it flying, South Carolina. Heritage not hate. States' rights. Happiness is a Northbound Yankee. War of Northern aggression."
You damn Yankees stay the hell out of my state. Actually Willians Brice holds 85,000 but USC would probably never allow it. They turned down the Carolina Panthers the first year because they said it would compete with USC.