I am glad to see you will be keeping them in pairs! Well said dc!
You can learn a lot from bracken ridge ranch - Jodi is a guru on buttons. Do yourself a favor and buy her book it is loaded with tons of info.
If you have any urgent questions please feel free to ask. Best advice is to keep them warm and lots of fresh water to drink and a high protein game bird or meat bird food/crumbles. this can be mixed up to 50% with a good quality pet finch seed mix, wild is not good enough. Always give them oyster shell for calcium and they love a dust bath, I keep a 8 inch round cake pan full of play sand, bought at Home Depot, in the enclosure at all times. My male will just sit and bathe for the longest time. I limit meal worms to 5 worms per week per bird as they are the candy of the button world and fattening. Do give them fresh veggies like broccoli, spinach, and even diced apple without the skin or seeds. Mine love the sunflower seeds I chop them up and give only once every couple weeks. Try lots of different fruits and veggies. No avocado, chocolate or the apple seed and skin.
I have a female sitting on 7 eggs now, last time she sat on 4 and hatched 2 pretty male chicks. I am getting excited to see what happens this time. Then it should be rest time as the season is changing and she normally stops laying in the winter. But you never know with these silly birds. Good luck and ask away!