This project took me about three weekends to complete, one dedicated to getting the finish right on the main cabinet. The wood ran about $60, the arcade hardware about $100, the computer $300, and the TV adapter about $75. Tools needed were a table saw, router, and power drill.
It's not a particularly difficult build, but the workmanship on the cabinet will make a huge difference here.
The plans will soon be for sale at GameCab.com.