I'm probably going to be out of line here, but I hope I'm not. I'm a long time lurker of this forum. I've had a chin in the past, but not for a long time. I'm extremely active in the fancy rat community. We hold a lot of the same view points as the chin community when it comes to care and breeding, etc.
We get a lot of newbies saying they got these rats that were "supposed to be both males". Then they slip later, admitting they knew they were a male/female pair and such.
Looking at the OP's past thread history, and just listening to the inconsistent stories, and knowing the OP is a minor, this seems very intentional.
She was set on making them a trio, then said ok, well she can separate them. They are both 100% males. Yet, she even says that they told her is a was a male/female pair a couple times. None of it really matches up, so I'm just gathering that this was an intentional thing.
You now have two males, which you very likely are NOT going to be able to bond together. And a female who is pregnant. You are going to need two separate cages, and you're going to have to order modified pans for the FN, because with most small animals, if there is a will, there's a way for them to get to one another and breed again or fight.
If this girls has trips, all boys. You decide to keep the boys, because you're sure to get attached, and they hit maturity, and begin fighting (I'm not saying it WILL happen, I'm saying it can.). They start beating each other and you have to separate. You'll have 6 different cages.
Or what if mum has a bad labor, and a baby gets stuck. You have seconds to rush her to the nearest e-vet. Do you have a ride for that? Do you have $1,000+ for the vet bills. What if she's in such bad shape, she needs to stay the night, potentially have surgery, etc? Can you afford that?
And if her and the babies get ill? Or if all three of them get ill at the same time, or there's an accident, can you afford that?
Maybe you should consider giving the female to a rescue who can afford her, and place her babies in homes that can definitely care for them throughout their entire lives. Then you could get a FN142, split it in half, and give each boy a half.
But I know newbies from the other forum I'm on. They don't tend to listen. Or tend to get mad, think everyone is attacking them, and then just say they're going to leave the forum. But that isn't learning.
If you're going to keep all of them, I suggest opening your ears and really LISTENING to what the people with experience are telling you. You openly admit to not knowing much, and yet you snub your nose at people who've been caring for these critters for years.
I knew a chinchilla breeder. He used the poly-something cages. 4 cages, with a run on the back. A female in 3 of the cages, and one set aside for the male. They were small cages. Maybe 15"X15". The run is big enough for a male to turn around in, and get to the females.
I'm not sure if most breeders use these style of cages, but the chins were happy and healthy. And gorgeous! He had some beautiful animals, and had very good ethics.
That cage may be small, per your standards. But the chins look really healthy, have a nice coat, doesn't look greasy or patchy. They definitely got some care.
Taking an animal from one situation you perceive as bad, and potentially throwing them into another that may go sour is NOT rescuing them.
I have some pics of the type of cages I'm speaking of(Not the exact ones, but very similar):
http://jtchins.com/images/600_Roseland_Pictures1_079.jpg
http://www.chinchillasource.com/image-files/breedingpair.jpg
