I have the 7500 and it is a beast to move. The 7900 will need to be on the bottom of a heavy duty rack or out in the open somewhere. You will only be able to move it with a handtruck. It weighs half a much as a refrigerator and can really stress some muscles if you are not careful. It also requires special circuitry in your house. It will also need some special protection gear. All in all it is a special piece of gear that has too much power for most of us. If you need that kind of power it will cost some $$$ to set it up.