I met the coolest boat couple a little bit ago -- and gosh, it's amazing the feats that ordinary folks can accomplish with a combination of naiveté and determination. It all began back in 1986 when Ted and his bride Sarah lived in Michigan on the water. Life was grand and they enjoyed boating, albeit in small (16') runabouts versus yachts.
To read about a couple who have taken their Manatee (Kadie Krogen 36) over 120k miles, you might wish to visit this page:
Janice142 article Manatee Moves
I think they are an amazing couple!