I like using the plastic dish pans for my nests. I got the larger size and built my nest boxes around them. When it's time to clean out the nests, I just dump out the shavings or pine straw on the floor and refill. If you happen to have a broken egg, much easier to rinse the egg yuk out than it is with a wooden nest box.
I used to have exterior nests, but it gets so hot here in Texas that the hens would just pant too much while laying. I pulled it apart and made some interior nests for them with plenty of air flow while they are in the nests. If you put it up high enough so that they can walk under it, you won't lose any floor space with interior nests.
As long as you have a secure run, I don't see where it would matter if the nests are inside or outside the coop. As long as they have protection from the weather.
I used to have exterior nests, but it gets so hot here in Texas that the hens would just pant too much while laying. I pulled it apart and made some interior nests for them with plenty of air flow while they are in the nests. If you put it up high enough so that they can walk under it, you won't lose any floor space with interior nests.
As long as you have a secure run, I don't see where it would matter if the nests are inside or outside the coop. As long as they have protection from the weather.