How about we just give out bounties for those turning in illegal aliens? At $500 a head, that would only cost about $15 billion for the entire 30 million illegals already here. For less than the same additional cost, we could deport them to the mother country.
If they return, it is 5 years in jail. If they do it a second time, it is 20 years in jail. I'll bet there would be very few in the latter category.