$1.2 billion is just for the stated federally funded health care.
When you count state welfare, education, state health, etc — it is in excess of $10 billion annually (and those estimates were from several years ago). I would guess it is somewhere in the $15-20 BILLION dollar range.
And that's not even counting the health care costs of American citizens infected with the various diseases being spread by the illegal aliens undocumented immigrants "displaced visitors."