Don’t have to deport them. Just cut off the free stuff. They’ll know what to do.
That would be my take as well.
I never supported rounding people up, but workplace raids and checking out the people the police come into contact with is appropriate.
I would also suggest any other public entity should be a part of the process.
Medical facilities, schools, government services...
Illegals need to go. When they bump into us, they need to be bumped out of the nation.
We did that for decades. We need to return to it.

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With the rest, remove incentives for staying here, including employers hiring them illegally, but not in the payroll.
Law enforcement and no freebies will cause a huge number to SELF-DEPORT.