The South always did seem to be an exporter primarily. No doubt they wouldn't beat the North economically, but if they did win the war, they'd certainly develop some type of stability.
I just hope that first, Paradox has events for a surviving Confederacy. It's one of the most formative possibilities in American alternate history. Even if it's hard to win, there's got to be a prize.
Second, you've got to have events for Confederate success or victory in other countries' history, too, because winning the war as the South almost certainly needs European help and/or recognition.
And third, the most important, some of those events must be slave revolts. Since no country in the world had the particular slavery system the South did, it's almost certain that the Confederacy would be a special case here, too. It might take forty years, but slavery would have to be challenged or ended, and the consequences would be severe either way.
It would be interesting because almost certainly, freedom taken is much better than freedom dispensed, slowly, bit by bit over decades.