I would highly recommend considering the Holbo air-bearing system although it may be just outside your price range.
The total mass of the deck is 12-kg, excluding the power and air supply unit. Of this, the platter is a hefty 5-kg.
I decided to put mine on a pretty solid platform from the get-go. Starting with a SolidSteel S2 rack, I added two slabs of sandstone which cost about $100, sitting on eight Sorbothane hemispheres (roughly another $100) for about 70-kg all-up mass excluding the rack.
My German Shepherds are no more, but I think the Holbo would have won!

