total cost for the stand?
That is one expensive DIY stand.

The stand now ready for the tank . . .
View attachment 714524
Looks Great. What type of wood did you use? What did you use to skin it? and If you don't mind me asking, How much did it cost you to build the stand?
is the tank sitting on top of the padding / insulation material?
i am planning on building something like this as well but mine will sit on a wood floor and i would like to be able to move it around so i would likely cover the bottom in felt pads...do you think that would cause a problem?
Yes the tank is sitting on padding. I got the stuff off a roll of underlay normally used for under laminate/wood flooring. Cheap and easy to work with
Also, I don't think what you are suggesting would cause a problem, should be fine. Why not use castor wheels fitted under the stand to make it real easy to move around? Stick a few on there though, too much weight just for 4 wheels!