rabbit cages

I got out of rabbits last year and I haven't gotten rid of the cages yet and it is time for them to go. I'm located in northern Illinois. This is what I have 3 - 24x30 cages with dura trays 1- 24x30 cage with a metal tray 1- 24x36 cage with legs and dura tray 1- 24x48 cage with legs and plastic...

Yes, I'm asking a newbie question. But my last breeding stock died off because caging and ventilation specifications were not met, and this time, I'm done being stupid. And by efficient, I mean money efficient. I don't want to spend 1,000 to house my breeding stock and fryers just for it to be...