Does anyone know if becoming an immigration lawyer would be a good career that contains a respectable income?

I know everyone thinks lawyers make ALOT of money, but I've read that immigration lawyers tend to vary in income. Im going to go to the University of Tennessee and wavering between an immigration lawyer or agricultural economics/business. (I really dont want to leave TN) Any ideas of which is and will be needed in the future? And that contains an income at least the same as a teachers?