I think you meant 250 gallon.
My son made a 80 gallon vertical, thick wall. It is like big UDS. Has 2 doors. 1 for food, 1 for fuel. The best thing is, the temps is so steady. Set it and forget it. He painted it black & orange.
Yours is even taller. You could have 3 or 4 racks in it or maybe a side firebox.