watch your hens and when one seems like she is about to go broody, [you will know] then call your egg person and have them ship them to you, then when you get eggs about 3 or 4 days later, your hen should be full into broody, then stick the eggs under her at night,,
PS ,I knew my hen was going broody, when she would sit in the nest for like 4 or 5 hours at a time ,and walk aroundthe nest ,sit by the nest, then a day or two later she would not come off her nest, I would even take her off and put her on the coop floor, and she just sat there, i went and got them fresh water and she was already back on the nest, Like I saiod you will kinda know when she starts to go broody, and that is when you call for your eggs, by time they get to you ,the hen should be full broody! Just my 2 cents