If you look at the website, you'll see under Machine Specs: "4' X 8' with 9 inch Z cut height, 12 " clearance under gantry."
Judging from that and the pictures I've seen, I'd say the overall package is less than 6'x10'. The height can be varied as long as there is enough room for the table, gantry, and movement. I'd say a minimum height would be about 3 feet, which you should have room for. From the pics, the as-designed height needed is probably around 5 feet.
My name is Electric Nachos. Sorry to impose, but I am the ocean.
http://www.bryanpryor.com
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)