I built a CFL grow box for $75. Got most of the stuff at Lowes, the fans and pots from a garage sale. Opened a six-pack and spent 2 hours putting it together (using blueprints I made, it was really easy). One side it veg, and one side is flower.

Lumber, braces, screws: ~$20
CFL bulbs (12): ~$25
Light fixtures (2): $10
Intake/Outtake fans: $15
Pots: $5

I know it's not an HPS or hydro setup, but I harvest every 2-3 months, and get ~ 3 ounces of nice headies. Barely any change in our electric bill.

Why would someone spend a ridiculous $1500 for something that could be built for 1/20th of that? And there's no way you are yielding a pound per harvest, let alone four pounds.