Those r Ikea shelfs. They cost rm85 each. So the combination u c on my wall is rm170. I did the installation myself as I haf the right tools n skill for the job.  I highly recommend most ppl to pay the Ikea technician to do the install. It's actually very difficult to do as u hafta make sure the shelf is level to the floor n also both shelfs must line up properly.
Yup, u need ure own wall plugs n screws of the right size n length.

OK lemme explain a lil bit about y I need 3 gfx cards.  When u run SLI it can only run on 1 monitor. So when I wanna use both my monitors for desktop work I need to switch off SLI in the control panel. Then oni can run both monitors. But it's very leceh coz when u turn SLI on n off it requires a reboot. So what the 3rd card does is allow u to leave SLI on all the time for the main monitor. The 3rd gfx card will power the 2nd monitor all the time. 

Those who r not running SLI dont hafta worry coz ur gfx card has 2 outputs at the back. Just plug in both monitors to 1 card n use control panel to set windows to run on 2 monitors.

Hope that clears up all the confusion for u guys.