Class Assignment on Mexican Immigration

Here is an assignment that I gave to one of my classes:

Given that it is indisputable that millions and millions of Mexicans should move to Amerika, and that

A) We must not allow overdevelopment of our cities,

B) We must not allow suburban sprawl, and

C) We must not allow developers to rape our farmland and countryside,

Then propose a policy that Amerika should adopt for housing these people (aside from the obvious one).