Hard question to answer.
At one time, I wanted a huge trailer so as I was able to store tables,awning, coolers etc. I liked to cook for a hunded + people.
Now, I find myself cooking for around 30, and usually it's somewhere that has everything I need, so no need to carry so much ice, water, etc. I really don't want to be stuck towing a monster behind me, especially on the way home.
So you got to sit down and think about what you would like to do with the smoker, and what you probably will be doing with the smoker, then meet in the middle somewhere.