I built a really nice cage out of Oak, that is 4'x2'x18", and I built a matching stand. Just build a frame out of 2x4's, so
it will be strong enough to support the weight. I then boxed it with 1/4" Oak plywood, and trimmed it out with solid oak boards.
I Put 2 doors on the front so I can store stuff underneath. Very strong, and looks great.

You could do something similar, but box it with matching melamine, or use 1/4" plywood, and paint it to match your cage.


Here is a link to step by step instructions for a fish tank stand ........ basically same build as a reptile cage stand.