<waits patiently for the torches and pitchforks...>

Not a good idea, don't be cheap just buy a separate enclosure lol I've heard a million times and live by it:

There are a ton of ways to save money on your ball pythons, but don't save when it comes to their safety.

Ask any of the "bigtime" breeders what they think about housing together, I bet they'll say "sure, if you want ALL of your snakes dead". Sickness doesn't just show up, and once you notice it, it'll be too late and then ALL your snakes will have it.