My two cents is to pass on this & get a better/bigger unit. I have an 8 oz. Lincoln Popper by Great Northern. My driveway movie nights usually bring 10-15 people, and I go through 3-4 batches of popcorn. I can pop a batch or two before showtime and they'll stay warm in the popper. I'll have another batch popping as people arrive and one later as needed.
I wouldn't want to have to do more batches or store the popped corn outside of the popper.