Interesting re the button quail. I had the idea they were listed, need a licence to keep them. Maybe not. There is a bit about them here.
http://birdcare.com.au/little_button_quail.htm .
I didn't track back to the homepage to read the govt. laws bit, will get to it.
Some of the Japanese quail are a bit self-destructive flying up into ceilings, these sound even more wild-bird, might need shadecloth ceiling like pheasants for protection.
With Japanese quail if you are only keeping a few Cupcake, stay with the more unusual colours, that way you can always sell them, or more readily than the common colours. The 'tuxedo' pieds with the white front seem to be well sought after, and the whites.
When I get organised (ha, pipe dream) I'm trying for same-colour pens to produce something predictable/consistent for selling fertile eggs rather than multimix common colours. And keeping away from the oversize birds meant mainly for table. But I do love the look of both Californian and Bobwhite quail. They seem about the same price as button quail (up to $150 pair, give or take). So looking at adding them to the list.
I'd love some of your findings re keeping the button quail going. Wild quail are disappearing, there were a few in our area up to just three years ago, but seem to have gone for good. Cropping, pesticides, over-grazing, all that as usual I guess.