if you are into metal fabrication, you can built an stand with cabinet
a 6 footer tank requires a glass panel not lower than 1/2 inch thick and
must have proper support.
in one of my project before, i had built an 8 footer tank using stainless
steel sheet in all sides and bottom except the view glass (front side). it
turn out to be cheaper, lighter, and easier to maintain. but there is a tricks
with the metal sheet to avoid warping; it requires press punch to stiffen with
back support bar or rod.