Saw an rv on one of the RV shows that the feller had converted so he could drive it into and across water. Interesting to say the least. Would had to see it in rough water could easily topple it being top heavy and all.
I think you're talking about the "Terra Wind" RV. Custom made and sells for $850K - $1.2M. Made for calm lakes, not rough water. Read all about it, and other custom specialty amphibious vehicles at:
www.terrawind.com
