I actually don't think it'd be that "hella big" in my cube. Rough numbers here:
79 nonbasics per draft (47 in the main cube 32 (8x4) from the utility land draft)
Assuming all of those get played, and 17 card decks, that means you're looking at about 7 basic lands per deck, or about 41% of the lands.
Let's say that when Rimjob Owl enters the battlefield there are 7 lands on each side of the table. Then we have an expected size of ~5.7 / 5.7. Assuming we're not playing other snow duders.
Sure, it can grow, but so can this guy.
But don't get me wrong, I love the idea of playing a cube where all basics are snow lands, and going from there.