That context makes sense with their use to fit specific challenges of fertility. I was looking at them from within Europe and Ireland as that’s a better analog for me. But the fact they were used so broadly would suggest they may be broadly successful. Or if you have experience that would suggest this to not be the case I would be very interested to avoid pitfalls.
Discussion
There are many types of dovecote in England too but they are different in material and size.
Most of the are built by brick and some of them are wooden. As you live in a humid area you should provide a passive ventilation. The size of entrance holes is the significant part to avoid birds of prey. You need some top holes for light. The floor must be built by a material in order to clean manure easily.
It's better to build roof by a material which would not be noisy in rainy days. Surely you should build a feeder and a fresh water resource inside to make pigeons feel comfort.
I've mentioned the basics. Surely It's better to start in smale scale. If you have enough time to study try to find some paopers on English dovecotes.