The North realized that if it did not act swiftly, the Southern states might take the precedent of the Scott case as a justification for expanding slavery into new territories and free states alike. The South recognized the threat of the Republican party and knew that the party had gained a considerable amount of support as a result of the Northern paranoia in the aftermath of the decision.
Depends on the pay. work untill you reach at least 30$ a day and you should be good if you are a starter.
Exceed the exports
Foreign markets stopped
loaned money