You'll enjoy the rats I'm quite sure. Even if they are being used to breed feeders, there's no reason you can't make pets out of the adults. It's far easier to deal with a female rat on her babies if she sees you as a friendly person she likes to interact with (though nursing momma rats can and will bite as a protective instinct).

I use large tubs with huge cut outs for ventilation and just love them. There's a sticky somewhere showing my rat enclosures as well as ideas from other members who keep and breed rats. Ventilation is a must as well as enough space so they aren't overcrowded unduly. Make sure your two males get along so they can buddy up when the females are busy with their young. Rats do not do well alone as they are a very social creature.

Your rats can use up a lot of your kitchen leftovers. I used to have a link before my computer died of a list of "human" foods that can and cannot be fed to rats. Connie, do you still have that one?