Let us assume that ICE will hit 1500 deports/day and can do that every day during this administration.
1500 x 365 x 4 = 2190000
That's a maximum of 2.19 million.
Now, it's a good start, but it's hardly going to solve the problem unless you can make them self-deport and in much larger numbers.
Take away public assistance and enforce E-Verify = mass self deportations. Maybe we'll see "migrant caravans" heading out of the U.S. for a change.