My husband builds incubators (they actually work!) out of wood and styrofoam. We have hatched close to 400 chickens and 600 quail so far this year. The incubators are as tall as a refrigerator ~ BTW, have you thought of converting a small refrigerator (like the size in college dorm rooms) into...
I think I posed my first reply to the wrong thread; anyway, I also have the insulated houses, with several heat lamps. I give the girls cooked oatmeal, the old fashioned kind. I just watch for it to go on sale. I also have the water wamers that provide nice warm water for them. Hope this helps :-)