* TAX the hell out of international wire transfers. There is NO reason NOT to do this, as this is THE reason most of these "migrant workers" are here ANYWAY—Make money off of the rich gringos and wire it south to "mi familia"
* Aggresively prosecute housing code violations, and ensure that neighborhoods and cities don't become barrios
On the first one, you will have due-process issues. On the second one, you will have discrimination problems if you restrict this tax to Hispanics, so everyone will have to suffer for the crimes of a few. On the third one, you have the same issue as the second one. Some judge will toss them out as 'profiling'.
End of problem.
One can carefully enact a law such that it won't deprive the rights of anyone other than the lawbreakers.
For instance, most localities already have statutes on loitering. Craft the legislation such that loitering without possession of a valid State driver's license (which would necessarily be unavailable to illegals) is aggravated trespassing (when in groups larger than a certain number), and set the penalty for violating that law to be jail time.
To keep them from "Getting off lightly," put prisoners back to work in hard, manual labor and put the appeals of these activities beyond the reach of the Judiciary (and, by supposition, from lawyers).
Towards the second one, it isn't enacted as a tax on "Hispanics." Simply follow Georgia's footsteps—If you don't have valid U.S. citizenship, proven by a State birth certificate, a passport, a naturalization card, or (again) a valid State driver's license, an additional 10% tax is levied against any international wire transfer. If that's challenged, then force everyone to suffer the crimes of a few, because I can ASSURE you that illegals are the majority of the customers of the international wire-transfer service.
For the third, there are jurisdictions already considering this. Insulate the process from the courts, and you can protect your State from being accused of "profiling." Every State's legislature has COMPLETE control over its' courts' jurisdiction, no?
They already trespass on private property and when I call the police they respond by saying have they committed any crime, and I explain I would like 50 guys shooed away from the corner and they laugh and proceed to tell me I am crazy - why should they do anything about hard working people just looking for work. An hour later they are out there picking up prostitutes and their johns. I fail to see the difference, but the Phoenix Police Chief certainly has his priorities straight! /sarcasm