I think the ex-owners would maybe take the $$, but given the worker the same deal - work for food & housing & clothing as landlord sees fit. Some would not work and leave, and I think those ex-owners would know their relationship was bad and be opposed to the buy out. Other workers would leave and take the chance at making a life for themselves. Those employers would also be unhappy. And no owner would know for certain how many ex-slaves would do that. For that reason I do not think the offer from the North would have been accepted. And I do not know if the North would want to put out that much money, prior to knowing the horrors of war. Even after the war dragged on and lives were lost or damaged, the North did nor offer this. Nor did the South offer it as an end to war when it was apparent in 1865 that they were losing.