I think they will use military forces first for the dangerous illegals first. It really would likely make sense to give people the option to self-deport to avoid very negative consequences, millions would. That would save a ton of $$$ and resources. Most illegals self-report by filing tax returns using an ITIN to get money BACK when they paid ZERO in. We know where they are. Tell them they will be investigated and prosecuted for fraud if they do not self-deport. Most of them have been guilty of massive amounts of fraud, things that citizens would rot in prison over.