Good luck. My 24 are now 5 weeks old today and it has been a huge pain having them in the house. I moved them to the basement last weekend (what a relief!), and am looking forward to moving them outside in mid to late February, weather permitting and if I can get them acclimated to the cold by turning the heat lamps lower and lower while in the basement over the next few weeks.
I started my 24 out in a dog kennel that was 2' x 3', and within a week they were too crowded. Fortunately the end of the dog kennel had a door, so I was able to connect 2 more kennels (about 20" x 30") in a line for a total of about 12 square feet of space. In my opinion, they grew out of that space by about 3.5 weeks old. At 4.5 weeks old, I moved them down to the basement and into a 6' x 10' chain link dog kennel, and I think they will be fine in that space until they are a few months old.
That has been my experience with space.
And if there's any way possible, avoid putting them in your house. The dust is unbelievable. And when I saw other people post that, I thought they were just too picky, and since I'm not that great a housekeeper anyway, I figured I could live with it. WRONG!!!! They aren't kidding about the dust. Keep them in the basement if you have to, but avoid inside the house with that many.