New caging troubles

[Marshallarts]

I'm looking to upgrade Marshall fairly soon, but I'm having a few difficulties. First, what size should I get? IVe been looking at a 4'x2'x2' with sliding glass doors. Is that too big for an adult ball python? Another thing, the stand I would be putting it on is considerably shorter than the tank, measuring at 30" long. Would it be alright if tank was hanging over the edge? Or would that cause problems? Should I look into a smaller cage? Let me know, thanks.