It's a nice utopian idea, but it just doesn't do anything. The aquaponics and greenhouse are just a bad utilization of such prime real estate space, the amount of food produced would be so low as to be a rounding error for the food they would still need to import and you could use that same floor space to house hundreds of more people.

Go look at my comment from a few minutes ago showing the production math for 5 stories of hydroponics.