How long can I collect chukar eggs before having to incubate them?

[LamarshFish]

Hey guys. My chukars are laying eggs. I'd like to buy an incubator and try hatching them. Right now, she's laying an egg every other day. I'd like to incubate as many eggs as possible. I was told chukar eggs are relatively unique in the sense that they can go about 28 days before needing to get into an incubator. I'm not sure what the veracity of that is though. I also heard that, while you can wait longer, it's best to get them in an incubator within 14 days. So I was going to stick with the 14 day mark, but since she's only laying an egg every other day, it may only leave me with 7 eggs to hatch. Then she'll keep laying eggs while I start incubating? What should I do? A second incubation period? Or should I wait an extra week to get some more eggs, and run the risk of the older eggs not hatching?

They are supposed to hatch an egg per day, so maybe she'll start doing that soon, not sure.

Also, any tips on incubating are greatly appreciated! I have one old incubator I can take from my mom's vet hospital for free, but it doesn't have a turner, so I was going to buy the Farm Innovators 4200 so I don't have to worry about messing up the turning process. I'm also buying a separate thermometer/hygrometer to make sure the temp and humidity are proper.