A few articles to reference when people try to act as if immigration under a permissive system like ours is cost-free:(This is not to say that immigration is bad, per se, but that our current system is not selective enough.
Immigrant households use welfare at a higher rate than natives. Here is a link to the referenced study and here is a more recent study.
In fact, CIS has a whole page on immigrant welfare use.
FAIR report on the burden imposed on taxpayers in each state by illegal immigration.
That is all.