swan eggs

When do veins appear on which day? It's been 10 days and I haven't seen anything. Should I wait 5 more days?:(😞

I would really love a pair of Australian Black Swans but due to expense I am open to taking a chance and purchasing some hatching eggs. If anyone has anything, please let me know!! I live in St George, SC but am willing to drive whatever distance necessary for these wonderful birds!