Should be like regular chicken eggs. Because they have a lighter shell they'll be easier to candle.
I find with different locals, that egg fertility can be between 70-100% (100% happened once and it was someone who shows their birds so they are kept separated in pens to keep the colors and patterns pure.) but 80% seems to be a good amount.
Hatch rate after that depends on you and the incubator. I think between 75-95% is a good ballpark.
So if you get ten eggs, I would expect six to hatch but it could be less or more.
I do think that's kind of expensive per egg though. They're trendy. But $48/dozen for local pickup....that's up to you decide if they are worth it.
I wouldn't get them hoping to breed them for money because it seems like everyone's breeding them, and soon there will be a new trendy bird that people are charging high prices for.
But I would probably buy 4-5 eggs just to have a few in the flock. I have some zombies bred from some ACs and they are some of our most aggressively in your face for food or free time but not human interaction, in everyone else's faces of that hatch bossing them around, while also being distrustful and ambivalent. Very game fowl type vibe for me. But they managed themselves outside very well and seemed to have a higher sense of self preservation than some of the other pure breeds that I hatched out with that same group. I get the impression ACs are like that but maybe you can look up AC threads to get an idea of temperament of a well bred AC.