So while a lot of people talk about cube as a big wild thing, I actually had a lot of success with a smaller, more contained version. When you do a classic draft, you get 3 boosters per person, and lands. So if you set up a cube with 45 cards per expected player and enough land to go around, that's only ~300 cards for 6 people. A fat pack holds about 400 on it's own so transport really just a smidge more in² than a paving brick.
Teaching is the hardest part though. It's got a low barrier to entry, I've taught people in 20min, but keeping it simple will really dumb down your potential when it comes to making a cube.