I'll try to answer some of your question, although I live many miles north of Calabash.
1. There is a Brunswick Transit System with 16 vans:
Brunswick Transit System
2. You can expect hurricanes every few years. The insurance naturally costs money, and it varies with the cost of your house. We pay about $1600 annually for the "wind and hail" coverage plus $800 for the contents on a house worth about $300,000.
3. You will have to define "affordable", but there is a golf course community called Carolina Shores where most homes are under $250,000, and go as low as $114,000. It is very close to the Intracoastal Waterway where you can fish with a boat.
4. I would expect HOA fees run from $80-200/month depending on what you get. One real estate listing on Cleek Court advertises that Carolina Shores is: "a golf course community with some of the lowest HOA fees in the area including a large pool, clubhouse, tennis courts, picnic area and bocci courts with no management company- ran by owners". If you want to contact Carolina Shores, here is a website:
http://www.carolinashorespoa.org/
5. Naturally there are alligators, but they stay close to the water. If you expect to let the dogs out and you live near water, you should plan to have a fence.
6. You can sit out on a screened porch in the morning and evening. I consider it too hot to be outside at noon.