I stumbled on this site and thought some might like to look at it. Click on How to be cheap in Vegas in the left column. I didn't see Ellis Island listed. The food at Ellis is inexpensive and OK for the price.

http://www.vegaspopular.com/

For those who don't mind spending more and are looking for a good meal you might want to visit Boulder Station. Our favorite place is The Broiler Room at Boulder Station. We have dined with countless visitors there and they always want to go back. You can eat well there for thirty dollars or less.