Here is a bit of info on them from our albums Beachcomber.
There are a couple folks with them here. They can give you intimate details if they see this.
Rotten floors are not unique to any one model, I wouldn't hold what you saw against the brand. Any trailer with a wood floor that isn't taken care of.. and leaks
etc are allowed to fester will develop them.
Some trailers WILL have a certain spot that is more vulnerable than others due to a specific design flaw (I can tell you that 13 foot Burros have an issue with the entryway) But I have not heard of a specific spot that rots that is unique to a beachcomber