Ironically enough, talking about cutting expenses, the keyboard in the photo could easily cost 10 times more than the typical 100% keyboard you'd find in a corporate office.
They def pricier on chassis, plate (foam too!) and ready-to-use designed pcb with components. However from my own experience building your own keyboard is fun especially when the result is as good as you expected from planning stage. Pure bliss.
I wrote "could easily cost 10 times more", which doesn't exclude an even higher price. $100-$150 for just the case (I couldn't find the exact one) is what I'd expect.