Seeing as though the main problem is the actual yearly supply of purchaseable slaves being a relative constant, I should probably do a graph or something here, with the industrialists getting about 10-35% of that available slave market, due to some of the plantation owners being industrialists and the boom and bust cycle of cash crops, we would need to either:
A: Increase the slave supply. This can be done through an increase in domestic slave population growth, although that probably won't do much in the grand scheme of things, or an increase in the success and volume of the illegal slave importation, which can be done through a weakening of the West Africa Squadron or better relations with other major slaveholder places like the Caribbean or Brazil.
B: A lesser number of cotton booms leading to the other slaveholders getting a chance at the slave markets. This could perhaps be caused by a worsening of trade relations between the USA and the European markets with crises like the Aroostook War getting worse than OTL in the background. Anybody up for tariff wars?
C: Increasing the success of indentured servitude. This one is kinda hard what with the racial caste system in place and the ban on persecuting people for debts, but you could probably get by with getting poor Sicilians and Neapolitans or any other sub white poor Europeans as the indentured servants. Well, Italians were pretty much treated like blacks during Reconstruction, so yeah.
D: All of the above.
A: Increase the slave supply. This can be done through an increase in domestic slave population growth, although that probably won't do much in the grand scheme of things, or an increase in the success and volume of the illegal slave importation, which can be done through a weakening of the West Africa Squadron or better relations with other major slaveholder places like the Caribbean or Brazil.
B: A lesser number of cotton booms leading to the other slaveholders getting a chance at the slave markets. This could perhaps be caused by a worsening of trade relations between the USA and the European markets with crises like the Aroostook War getting worse than OTL in the background. Anybody up for tariff wars?
C: Increasing the success of indentured servitude. This one is kinda hard what with the racial caste system in place and the ban on persecuting people for debts, but you could probably get by with getting poor Sicilians and Neapolitans or any other sub white poor Europeans as the indentured servants. Well, Italians were pretty much treated like blacks during Reconstruction, so yeah.
D: All of the above.