And the cost of not deporting them is??
As you say...
Activation of the full national guard for all 50 states won’t cost that much. Under a commander in chief that means to enforce the laws on the books against foreign invaders within the borders (not Americans so it’s not a Constitutional issue) working for other federal agencies in charge of the operation will work.
“And the cost of not deporting them is??”
Incalculable for sure.