I'd be inclined to keep males as a group as they are more likely to get along, especially with no girls around (plus they are usually prettier). Females could get territorial when laying (males fight over females, females fight over territory). Their eggs aren't large enough to eat (unless you have a lot of quail). Overall they are happiest as a mated pair and not really suited to being kept in a colony situation.
Females often die from becoming egg bound and some are desperate to be mothers (they can be very good at hiding their eggs and nests). Removing eggs would mean they would just keep laying which is a huge drain on their little bodies and it would severely shorten their lives. You would need to make some polymer clay fake eggs to replace the real ones and let them brood them if you really don't want babies.
Pairs need 5 sq foot so base your cage size on that. They are very active quail and shouldn't be kept in small cages. They are escape artists, able to squeeze out of small gaps, they fly and jump very well too, and are pretty wild, even when brought up with a lot of handling. Japanese/Coturnix make much better pets unless you are happy just to watch them from a distance. They can be kept as a large group, don't go broody (except on very rare occasions) and need a lot less space.
Thank you for all of the info. I am just really confused right now with all the different information I am getting. I watched lots of videos and read lots of websites to research them. I saw plenty of people keeping them in 40 gallon tanks with a special "nylon mesh" lid so they don't injure themselves when jumping, and I was planning to do this as well, is a 40 gallon large enough? I have an empty 40 gallon just lying around and I would love to use it to give some little quail a good home. See, that's weird, I was seeing people saying housing 3 females and 1 male was best, others saying M/F pairs were better, and some saying they were fine in groups of 3 females and no male, so I really don't understand. I really don't want babies, because I don't have the room to house them all, especially if they all end up males having to be housed separately. I have heard they multiply quickly and can go from a pair to dozens in no time if you don't do something about it.
Would they not realize a clay egg is fake? What will they do if they realize the fake eggs never hatch, do they sit on them forever? What should I do with a fertilized egg? Will it grow and hatch if I leave it at room temperature?
I was interested in the button quails because they are smaller and can be kept in tanks, I'm guessing the larger quail types would need a barred/wire/mesh cage and more space, correct?
I live in a town where there are lots of feral cats, so I was planning on keeping them inside because it is safest.
From everything I've read, button quail ideally are kept in pairs of 1 male and 1 female. I can't see why fertilized eggs would be a problem, you definitely wouldn't be overrun with baby quail as long as you remove eggs regularly (and of course don't put them in an incubator lol)
I see, thank you! I don't want fertilized eggs because if I'm not going to hatch them, I'm not sure what I am supposed to do with them. My family wouldn't eat quail eggs lol, and I would feel bad throwing them away or something

Is it not a baby if it's fertilized? Would you be killing baby chicks if you take the eggs?