BP Breeding

Yeah, clear plastic storage bins would be a fantastic solution for you! All you have to do is drill air holes in the sides. Get the ones with the locking lids!

From there, you can build them new homes gradually. You can start the economic route, and then make it more elaborate over time, if you want.

After you get the bins and drill the air holes, get two under tank heaters and thermostats.
These thermostats work just fine
http://www.amazon.com/Hydrofarm-MTPR...5926304&sr=8-1

And these under tank heaters work just fine too.
http://www.amazon.com/Zoo-Med-ReptiT...5926352&sr=8-3

Line the bottom the tubs with newspaper or paper towels and feed the probe of the thermostat through one of the air holes and under the newspaper and place the heater under one side of the tank, right under the probe. Plug the UTH into the thermostat and set if for about 90 degrees.

Get a water bowl for each tub, and two things to hide under. Hides can be card board shoe boxes, anything with an entry hole cut in it that the snake can fit in snugly. A great solution is to get some cheap plastic bowls, again, a good size for the snake to JUST fit into, they like to be snug, and cut an entry hole. Just be sure to burn the edges smooth with a lighter so they don't cut themselves. You want one hide on the warm side, right above the heater, and one on the cool side.

This really simple set up will do wonders for them. You can get them some fake plants or branches, or get some bark substrates as time goes on if you like. But just investing around $100 for the heaters, thermostats and tubs combined just to get them started will do wonders. Hides will set you back $1 each if you go to some place like the dollar tree for some bowls, and water bowls should just be something heavy that they can't knock over. $100 may seem like a lot, but the snakes will thank you for it.

It is absolutely essential that they have separate homes, not just for the breeding concern, but because it is only stressing them out more.

I commend you for taking them in. The poor things would have died miserable without you.

A digital kitchen scale is a very important tool to have with BPs. Track their weight so you know how much they're gaining, and how much they lose if they go off feed. Walmart has scales for ~$25.

I noticed you said you're feeding them mice. At that age, unless they are severely underweight, they should be big enough to take weanling- to small-sized rats. Weigh each snake, and each should take a rat that's about 10-15% of its body weight. Once they get big enough for the math to no longer make sense (e.g. a 2000g snake doesn't need a 200g rat), you shouldn't ever need to feed larger than an 80g rat (high end of the "small" weight range).

Good luck! :gj: