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You can put say 25-30% of the tank water in a bucket or a tote then put the fish in.
I would then drain the tank, remove the sand, add the gravel, plants etc.. start adding clean temp. water say 25%, then add the water where the fish are.
Then add the 2 fish back in then...
I have 2 - 125 and when i did move them I used a hand truck, then had someone help me lift it back onto the stand.
As far as the stand I built mine out of 4x4 post lumber then used marine grade plywood on the outside and stained it