Hi Tom, I think that as you are collecting your own eggs for hatching you probably have some quails already and I wondered what kind of cage you use for them. I suppose the main thing with CPQs is to have 1/2inch mesh max. if you want to keep them in a mesh sided cage of any type as they are so tiny, especially when small, and may escape though larger mesh. Many people just keep them in the sort of Guinea pig cage which is basically a plastic tray with a wire mesh removeable top, which is easy to move around and to keep clean. They can live outside, but are great escapologists so you need to bear this in mind, I have Coturnix, not COQs, and mine live in cages in a summer house in winter, where its dry and comfortable and I can provide the small amount of light that keeps them laying when my hens have given up. In summer they go out into a moveable rabbit run on grass, with a clear plastic cover over it to keep it dry and give wind protection. Quails are hardy, but hate wind and cannot manage damp conditions, especially in winter. You can see some pics of my setup in Sarah Barratt's 3excellent book 'Practical Quail Keeping' see http://www.amazon.co.uk/Practical-Quail-Keeping-Sarah-Barratt/dp/1847974635/ref=sr_1_1?ie=UTF8&qid=1399031790&sr=8-1&keywords=Practical+quail+keeping
This book is mainly about coturnix but the general principles of looking after them are the same whatever species you keep, so long as you make allowances for the smaller size of CPQs. Do get the book if you haven't come across it before its a mine of information.