I've just bought a used hand-built coop/brooder in which the builder indicated a hook that she said was to hang your heating lamp for the chicks. I haven't bought my chicks yet (want to be all set up for them first) but I was planning to keep them in a tub in a spare room of my house for the first 6 weeks or so, and then move them outside where they would free range and house in this coop at night. But apparently, according to the builder, I could just put them directly in the brooder as she did as long as they have an outdoor heat lamp (if such a thing exists)?
What do you all think? My concerns are 1) it still being too cold for them even with a heat lamp and 2) if the heat lamp were to somehow short and cause a fire in the coop (I suppose this could happen in the house as well, but seems more likely to happen outdoors)
For context, I am only getting three chicks and I live in Texas so the nights have been 30s-40s and days in the 60s-70s. The coop is quite large, probably meant for 6-8 hens.