This is not my field. But I think might have something of a peace project type of an idea.
I wonder. Could the initial cost of taking in many refugees be shared among the countries of the world? The idea is that more countries would be more inclined to do so if this is the case.
Then maybe an idea would be that there are beneficial country size loans or write offs that could be offered by the world community.
Since this should be an efficient use of money. There should be a requirement for these loans and write offs that the refugees get into the workforce in a short time period since arrival.
I believe this could be seen as a peace project and as an investment in people.