If you need not to print that big scanned object, you will have many options. 3d printer of your desired size is very rare and the cost will be pretty high. I am not telling about buying it. Again you will not get the scanning facility as I think.
CNC craving can be a better option for you for this size. Routers are inexpensive, but you need to build them. I have shared my idea here. You can take suggestions of the specialists.