It is interesting that we can count illegals when we want i.e. you can't deport 12,000,000 people, but we can't seem to be able to count them at others i.e. we spend too much in healtcare on illegals. Once more it's not the statistics but the statisticians that tell the story.
I use to work for Harris County. The county has a pretty good idea what it cost them to provide services to illegals. For political reasons this number is seldom advertised. However it is a lot more than a buck three eighty!
The rub for most Border states, is that the Federal Government is responsible for imagration, but the local government picks up the tab. In some border counties the cost to provide emergency health care, mainly new borns, exceeds the county budget. Imagine, you wake up some morning and there are 60 strangers sitting at your table, and your local government says it is your responsiblity to feed them and pay their doctor's bill. While that may sound stupid, that is exactly what happens in the border states. Your visitors may cut your grass and even all your neighbors, they get paid, but you pick up thier expence.