Magnificent fun - throughly recommended. I did it in a 85hp J-3 Cub with wellies. In Florida in August. Not the greatest performance, but that was far from the point.
Jack Brown's Seaplane Base
Must have done about 6 hours, including check ride, but that's it. I knew before I did it that few places (if any) in US or Canada will rent solo due to insurance reasons, and there were no aircraft (at the time) in UK at all except for a very few private types. But the fun and the challenge was what I went for, and I am in no doubt that I got my money's worth.
Hours building? Most other ways of doing that will be cheaper and more effective. Don't do the rating for that reason - do it because it's THERE.
