Huntsville is in a hurricane zone.
No, Huntsville is nearer the border of Tennessee than the shore of the sea.
It is reasonable to require structures more substantial than trailers. In a windstorm, bits of trailer tend to blow about and can damage other people's homes.
This seems fetched from far, if a tornado were to strike , what sort of building is not going to produce flying debris?
I think that Huntsville is trying to rid itself of low rent property, they might as well outlaw poverty and bus all the poor out of state.
One of the problems Tyler Truitt must have , but has not been mentioned in the resources I have found , is that the constitution of Alabama is a terrible mess, you really don't learn what rights you have by reading it.
....Or attempting to read it, it is a real mess.