For initial transbordador service Mexico purchased retired North Sea ferries from Denmark. They were shallow draft. The Puerto Vallarta took a beating traveling from San Lucas to PV and was retired. Because of open ocean rather than flat Gulf of California seas.
I'm just a broken down EE and MBA and no matter how I pencil out the fees, costs insurance and maintenance for such a run - it does not fit. Alarm bells go off. If fuel cost sixty cents US a gallon it would not be so unfeasible.
Raise transit costs to make things fit and customers dry up. There is zero commercial cargo eligible to be transported on that route. From New Orleans or Houston, perhaps, but not from Florida.
A pier is needed. 35' dredged. Breakwater or jetty. Infrastructure and logistics support.
Aw Jeez...
