You two are going to have to show your math rather than simply make "trust me, I know" proclamations.

I did this twice at Ellis Island last time it was offered, got the entirety in free play, ran it through once, and left with a profit each time. I played quarters, so I had plenty of hands to keep the variance down. Not a magic trick. I don't play the double/triple/God-help-me-hit-four-of-a-kind high variance games.

Some people can walk away, win or lose, after playing it through once. Some people cannot.

And I think monet mentioned the machine jammed up regularly. Yeah, it did for me. He knows whereof he speaks.