Can you afford (mentally & monetarily) to have any eaten? There are numerous pictures out there of babies eating other babies, including a brave corn that ate the baby cobra it was being fed it. Adults seem to be less prone to it.

As to when, what if you think you still have you have time, but they decide otherwise? Breeding to early can damage a female & is a waste of her resources.

Will they eat eachother if they're fed very regularly? I feed them 1 pinkie each twice a week. I've had minimal times where I fed them once a week instead of twice.

The snakes are FAR too small to breed. They're less than one year old. Will they try to?

I have seen many instances of even well fed baby corns eating each other from stress and not out of hunger.

I keep baby corn snakes in 6 inch deli cups with those little candle holders as water dishes and use a tiny heat pad and put just the edge of the container on there. You could use disposable tupperware or even recycle clear food containers. Plenty of small smooth edged air holes and some water is all they need, besides food of course lol. You could go as far as setting up a shelf, getting quality plastic containers, putting a heat pad on the back of the shelf and voila, a temporary rack! Just be aware of your temps, 82-84 is plenty for a baby corn.

I wouldn't risk it, particularly with babies. They do tend towards cannibalism.

Thanks for the info guys! Shellboa that's great I can do something small so I can get a larger rack and skip a price mid-step. I was worried about keeping them together, but didn't realize it was as likely an issue as it is. They've been together about 5 weeks at this point. Maybe 6.

I'm with Shellboa.  Disposable plastic containers for babies all the way!  I like the Ziplock long containers with tiny holes melted in the sides for air.  I got a dozen 2 oz stainless steel sauce cups from Amazon.com for like $6, and I use those for water.  You can stack the little Ziplock containers and run some heat tape on a board behind the containers.  It works for the babies until they're big enough for a real rack or display cages.  

Oh yeah, Walmart has some Sterilite "modular latch boxes" that work really well too once the babies are bigger.  They have green (or blue) plastic removable handles that flip up to hold the lid on.  But you can pop the handles off later if you want to use the tubs in a rack and don't like the handles blocking your view.  The 25 quart is about 24" long, and works pretty great for corns from maybe 9 months or so up until 2 years.  

I'm super into these modular latch boxes, because they make me feel safe if I have an emergency.  You can always snap the handles back on, and used the boxes standalone, without the rack.  So if you need to leave your house becase of a storm or something, the tubs and snakes can come with you, without the rack!  Or if you need to take a snake to the vet - transport tub is ready!

OOPs gotta go!  Good luck.