Wondering if my setup is practical

Well as I've stated my grow space is a hollowed out model car display case. It's dimensions are about 3' wide, 2.5' deep, 3' high. There's room for about 12-15 6" pots in there. So I was wondering how big of a plant could I grow in a 6" pot, and how much yield I'd be getting per plant. My lighting and stuff is pretty decent. I have two t5's mounted on the sides, and a 430 watt son agro at the top (don't worry the case came with a build in extraction fan for some reason, and it's so powerful I think if you stand too close it could extract your soul.) Any thoughts?

three feet high? unfortunately not very much man. Don't forget those plants are gonna need a lot of room to grow.plus your lights are gonna take up at least 6 inches to a foot.

k tnx a lot dude. Hmmm wondering if I should take the top of this case and add like another foot or so? But how much is not a lot lol. If I were to grow like 12 1' tall plants and mature em at 1 foot, how much would that yield?

Barely anything...I don't even know if that would work.

If space is an issue for you, you should check into growing some lowryers.