It is difficult to believe anyone with one brain cell would think the revenue from the South would be anywhere close to pre-war numbers. There may have been a few in the North with those pinky tinted glasses who really believed the free slaves could just plop down stakes on some land, start growing crops and they'd live happily ever after. [Yes, I'm saying there may have been some people above the MD line with less than one brain cell] I guess they thought the free would just take over some 40's from someone who had fewer workers. They possibly assumed they could get a mule on credit too. It would be interesting to know just how things would have gone had Lincoln not been taken from the picture but that's just something to ponder. It makes no difference now but without some of that 'payback' attitude there may have been some easier way to assimilate those who were free.
The ports would be open and they were taking in stuff right n left. If nothing else, the South learned one thing. Not to put all those eggs in one bale. We had to have more industrial business ventures. Planting was iffy in a good year and after the war it was a long time til they saw a 'good year'. If nothing else, the South had a huge supply of granite for grave stones. Elbert County, Georgia is still chunking it up in some very nice pieces.