Try doing some research at the Center for Immigration Studies. They have conducted extensive research including this report:
Tired and Poor: The Bankrupt Arguments for Mass, Unskilled Immigration
by Steven A. Camarota
National Review, September 3, 2001
"We at the Center for Immigration Studies estimate that the average Mexican immigrant will use $55,200 more in public services during his lifetime than he pays in taxes."
People are people, and I don't like anybody living off my tax money.
Rights over priviledges bump!