Incubating chicken eggs?

So, I have two laying hens and a couple roosters. The laying hens just started laying eggs, and they are fertilized. since a chicken only lays one egg a day, i only get two eggs. But I want to put the eggs in an incubator but I want to put more than two. so would it be bad that I put two eggs in everyday? or is it possible that I can just keep the eggs in the house for 4 days so i can put the 8 eggs in the incubator all at once, or would that not work? If you also know, what temperature do i put the incubator at? and for how many days? The chickens I have are plymouth barred rock Thanks