That's right, tons of Mexicans coming across the border, having babies. But it costs a lot more to rent a U-Haul leaving Californian than going there. That's because all the taxpayers are being driven away.
As for your assertion that illegal immigration is putting all the clinics and hospitals along the border out of business, that is incorrect.
As the population in the Mexican border towns has grown rapidly, the mexican residents have put strains on the US medical machine. They have always utilized US facilities, this is not new.