There are two camps on this one, neither one is 100% right or wrong. First of all it would be very helpful to know where you are and what your winters are like on average.
If you keep them in the house, they'll be growing and outgrowing whatever you put them in, unless it's huge to start with. If you plan to put them out in a few weeks, your temps outdoors will probably not be in that "balmy" 30 degree range anymore, and you're going to need to supplement some heat as they go from indoors with controlled heat to a drastic outdoor change smack dab at the end of December. So are you prepared to keep them inside until the weather starts it's upswing? That could be March or April. On the plus side, you don't have to worry about winter predators and freezing water sources, and if the power goes out as it often does in winter your chicks would still be pretty safe at ambient indoor temperatures.
I'm in a different camp. I believe in the inborn hardiness of chicks raised as naturally as they would be under a broody hen, and they'll hatch eggs any time of the year. So I brood my chicks outdoors in the run from the start, using a heating pad and a cave. I have day olds with daytime temps in the teens and twenties out there and they thrive. They are in a pen within our run, which is covered with clear plastic like a greenhouse and as secure from predators as we could make it. Those of us who use this system have found that our chicks are stronger, feather out faster, and when they are in total control of their comfort they thrive. The downside is that in the event of a power outage you'd have to go out there and make sure they are okay and get that heating pad started up again. I had that happen with the last batch of chicks and we had extreme winds and snow blowing sideways. It was a few hours before the sound of the power coming back on woke my husband and we made a mad dash out there to get things going again. The week old chicks were fine - the cave with it's thick straw insulation had maintained enough residual heat to keep them safe. If you start them outside, they would have the chill of November to get through but have their cave to rely on, and by the end of December they'd be so feathered out it would surprise you, and most likely able to handle the cold very well.
So the short answer to your question is......<drum roll please>......... whatever you feel comfortable doing is the best plan. Neither way is 100% the only way. @Ridgerunner combines the outdoor brooding with a heat lamp and broods chicks outside as soon as they come out of the incubator and are dry, and has done so for quite some time regardless of the weather.
Edited by Blooie - 10/24/15 at 6:49pm