Honestly, I'd be more concerned about the financial side of things regarding illegals getting benefits or not paying taxes. I honestly don't know if that is a huge financial problem in the grand scheme of things. While it's annoying to see illegal immigrants getting benefits without paying taxes, I don't know how often it actually happens or if it even is a huge amount of money lost.
Most illegals orininally come here legally. They have a work ID number, similar to a SSN, so they can get a job and pay taxes. Most keep using that number when they overstay their visa, or leave and come back illegally. In other words, they keep paying taxes.
They are NOT eligible for medicaid or welfare assistance. That is a right wing lie that has been said enough times that people actually believe it.
Yes, they do use the ER when they get sick, and usually cannot afford to pay. That is true.
Financially, the cost of billions of dollars in crops rotting in the fields right now, is a much bigger deal.