Here is a cool tool that lets you prepare doner kebabs like a pro. The Tacos Al Pastor Machine is a vertical broiler that operates on propane gas. It comes with a stainless steel construction with 3 burners. You can cook up to 40 lbs of meat with this.
The machine measures 18 1/2″ width by 20 1/2″ in depth by 30″ in height. More information is available here.