Nah, luxury boxes are a minor expense compared to the big picture. SJE's stadium is so cheap because, although it does look nice, that's a very minimalist design. It's essentially just three stand being held up by scaffolding, plus a few shops serving as a concourse. There's no wall around the exterior, very little of the building is actually indoors, there's basically no roof to speak of, the entrances are just a heavy duty gate with a couple of staff huts. I'm not saying it's a bad stadium - as I said above, it does look like a nice place, but compare it with some serious stadia around the world and there's some major differences.