yes, time for completion is the concern -
How high would you like the spiral to rise?
One forum member did the whole Christmas tree up the outside and down the inside. One on YouTube rise about four feet. Those take months
A simple turn of 3/4 to once around with a rise of about 6"-7" and mostly scenery would be possible, but still a big push to get completed before Thanksgiving.
I have attached a 4' x 8' that would still take a lot of hours to complete by Thanksgiving. Foam is used for the terrain. North Pole on left with 20" tree and mountain on right- the peak is made to sit inside of the spiral