Why pay to do it? Just dry up the employment and freebie swamp, then they`ll mostly self deport. The remainder are criminals that can be handled like any other criminals, before mandatory deportation.
Because if you do only that, Dems and leftist Reoublicans can find ways to keep them here and use them as political cannon fodder.
We need to pay the cost and get them out. Deporting every one would cost less than Berry sends to ISIS/AQ in a year.