Yep tomorrow should be 40 breeder buying day. These stands like this one at Menards here is perfect to hold them. Lowes, home depot, etc all have them, as I belive Menards is just in Wisconsin but I guess I dont really know. It is a really tight fit and the bottom tank has to slide down from the top before putting on the top shelf and tank. But its like the 40 breeders were made for this.
The tank rests all 4 corners on the metal framing and each shelf is around 1000 pounds rating from the few I have looked at.
I dont think I can build a double stand like this for much less and this is already good to go out of a box.
http://www.menards.com/main/p-2289607-c-13051.htm