Mine is a 10'x12' extra bedroom on the second floor. It has 2 big windows so I don't need to worry about a light cycle and they both face south so it keeps that room around 75-76 degrees along with central air/heating. Currently, I have 2 bps and 8 corns in there but there is plenty of space for more in the racks. As for quarantine, I use the large closet in that room or they stay downstairs. The only herps kept on the main level are my original pair of corns and my beardie who are in display setups.