I have buttons; they're really cute, always active and cheery. I would recommend you get at least two, though, they are very social birds. From the pictures of your cage, I would suggest you put some smaller wire (1/2 inch hardware cloth is good) on the cage. Buttons are very small and it looks like they could get their heads caught in wire that size. Another thing you need to be aware of is that buttons do fly straight up when something startles them, and they can go a good 5 feet up, but they tire fast after that.
As far as feeding them goes, I give mine chick crumble and ground oyster shell (the kind you find in feed stores, smashed further) for calcium. For other stuff, they'll eat most things that a chicken would eat: lettuce, bird seed, etc. They also love to pick at melon rinds. they are, for the most part, like really tiny chickens, right down to the sounds they make.
When you do get them, I would advise you hatch them yourself. newborn button quail chicks are about the size of a bumblebee and are very, very fragile. I don't know how well they would travel. They are quite easy to incubate, have the same incubating temprature as chickens (101 degrees (F) still-air, 99.5 degrees (F) forced-air), and take about 15 or 16 days to incubate. The experience of hatching and raising buttons can be educational and enjoyable.
Good luck!
Greta and the gang
