If they are indoor, I'd highly recommend building an NIC cage for them- you can make them as big as you need to fit the space you have, and they make great sized cages! You can find all about them in the Library section, or in our Photo Philes section there's threads with pictures of cages!
If it's outdoor, then quite a few members here have made hutches, so hopefully one of them will come along and help you out soon. Or, a great (and spacious) idea is to convert a wooden shed/playhouse