No need for a wall anymore. They are being rounded up and sent home now and aren't coming back at least while Trump is in office.
You have a point, but it looks like the wall may still get built if the recently passed budget still includes all or only part of the expenses listed below.
The Senate budget reconciliation bill that was passed included an allocation of funds for immigration detention and enforcement, including $45 billion for building new immigration detention centers, $29.9 billion for ICE’s enforcement and deportation operations, $10 billion fund to reimburse DHS for costs related to safeguarding the borders of the United States, and, surprise, surprise another $46.6 billion for border wall construction.
Also, the U.S. offered payments or other forms of assistance to countries in exchange for accepting deported individuals.
These and other expenses amount to an increase in the national debt of
$3.94 trillion over the next decade.