I have a fatbike but its too big for anyone to ride unless your 6'6'' or taller. These bikes can break trail through 8'' of snow if the tire pressure is low enough and has unlimited traction. You should just get one, I cant believe I didn't get one years ago. I rode 5 times in the past week for over 2hrs each time and my conditioning is the same as when I was riding in the fall. I will not know what it is like to get back into shape once the snow melts.
Buy one you will love it.