I have a metal tubestock stand. It is 4 - 3/4" x 3/4" points of wieght on the floor. It would work actually BETTER for me. if you built a cart for the tank to sit in, you could recess the whell a long way up, and almost not even see them. I did that with a 100g tank, that I turned into a Koi pond on the back patio. I could move them around as I needed to. 1000 lbs is not a lot of wieght on good wheels. People can push a car, and it wieghs a ton or more.
I left a little bit of water in the Rolling Koi pond one year... well, it rained, then froze, then snowed, and stayed snowed. The bottom corner popped out of it, and was done, so I made the hole a little bigger, put a couple inches of gravel in it, landscape fabric... filled it with topsoil... now I have a rolling Herb Cabana!!!
Anyway, the wheels I used were full swivel, 800lbs per. So it would handle 3200 lbs total. And moved like a breeze full. It was just the schlosh at the end when it stopped that always got my toes wet. lol