bit late in the day but chinese painted quail make do with a living area of 6 sq foot per breeding pair and most other varieties require around 16 sq foot, the Chinese quail also have the habit of getting through 1/2 inch mesh I did have loads of info on these birds I'll see what else I can dig out,
just one point, make sure you don't get the heat lamp too close to the birds, they will over heat and die if your unlucky