Go to Office Depot. I just assembled a desk (SKU #154198) with way more space than I ever had in the dorms (L-shaped, 60" sides + hutch + kbd tray), was under 100 bucks including the hutch.
Building your own gaming PC is a rewarding experience and gives you far more control over the pieces and parts that wind up in your PC tower. Those without any familiarity of the internal workings of ...