Fabrication for swamp, not for rock
The work here is corrosion control and water management. Salt air on the coast, brackish water on the dike roads and months of standing fresh water in the interior all attack the same places: weld seams, bare edges, crossmembers that hold water, and every fastener under the vehicle. A Florida fabricator earns their keep with drainage, coating and sealed penetrations more than with armour.
If you are building for Big Cypress, build to the published numbers. The preserve measures tread face with a tape that follows the curve of the tyre, wants 9 inches of it on a swamp buggy and a UTV, and bans any tyre chain, bar grip or similar device outright. Tracked vehicles are prohibited, and so are trailers and campers on an ORV trail without a special use permit.