I had a 55g (split) housing a ball and a king. It was too heavy; hard to heat etc. I was considering a few different options (including a rack). I went with this:
Walmart sells a Black and Decker 4 Shelve for $29. I had a 10g laying around and bought a 20g used. This will let me keep 4 snakes against my wall (until I obtain enough to warrant a rack). It looks good and takes up less space than the 55g (pictured below).
You can fit a 20-29g on the top... a 10 standard will fit below (height restictions for standards). A 20-29g will fit 3rd down and same on bottom as the second down. Now there is plenty of room for a larger 2 3 and 4 (down) but it's restricted on height on standard glass aquariums. The next 2 will be custom to fill the width and height.
Question... I have the cheapo (with multiple locks!) screen lids on both. Will they tolerate a lot of lamp heat? My buddy says they've been known to melt on rare occasions (maybe lemon lids)
Also.. I want to keep heat and humidity in the top (20g for the ball)... put some black plastic over part of the mesh?
Here are before and after pics
55g (before the king was setup on the left)
After (with both and junk on the bottom 2)