I was considering letting my broody hatch eggs as well which would be a first for both of us. My nest boxes are roughly 2 feet off the ground. Would that be too risky to let broody raise them there?
Some people on this forum would freak out about that. My broody hens typically hatch in nests 2 feet and 4 feet above the coop floor without a problem. When I was a kid I saw a broody get her chicks down from a 10 feet high hayloft. She flew down, told them to jump, they did and bounced up to run to her. Isn't it nice to have kids that do what they are told!
I did have a problem once. The nest was a cat litter bucket with the top 7-1/2" x 11-1/2". That 7-1/2" was too small. The hen was sitting so close to the side that when the chicks climbed up on her back and then fell off they missed the nest and fell to the floor, 4 feet below. Four different times I had to pick up a chick and put it back in the nest with the broody, probably the same chick. It fell 4 feet and was not hurt. I retired that nest after that hatch.
So what do your nests look like? Are they so tiny or built in a way that the chicks can hit the floor if they fall off of her back?
Also, once the eggs hatch- do I let the babies roam around with my other adult hens? Or do they need to be separated? (I have 8 chickens. )
We do this different ways. Some of us allow a broody hen to hatch and raise her chicks with the flock. Some isolate during incubation, hatch, or after hatch. Lots of different ways you can approach this. I don't consider any of them the only right way with everything else wrong. But your conditions might influence your decision.
What does your coop look like? Is it tiny with space cramped or does the broody hen have enough room to take care of her chicks? With 8 chickens other than the chicks if it is a 4' x 8' it is probably pretty cramped. Is it elevated with a ramp? baby chicks can learn to use a ramp, but you want to be out there the first few nights after they leave the coop during the day to make sure they all get back up.
How much room do you have outside? Does the broody have enough room to take care of her chicks without the other hens being on top of her?
Do you have enough room for the chicks to take care of themselves once the broody hen weans them? I've had broody hens wean their chicks as early as 3 weeks or as late as 3 months of age. This means the chicks need to take care of themselves, she has stopped helping them. They need enough room to stay away from the adults (including the former broody) until they can join the pecking order, which for mine is about the time they start laying.
No easy clearcut answers to any of this. Many of us maneuver through this all of the time, some in less than ideal conditions. Good luck!