I just went to the boats.com website to look at the boat. A 37' aluminum hull for $38,000 sounds like a good buy. Although the pictures aren't that good, it looks as if it's a home built interior.
Is the only sleeping space the forward V-berth? No quarter berths or pilot berths? I wouldn't be happy blue water sailing with only a forward v-berth - most uncomfortable in any type of chop. And I would take the comment "Voyageur can average 150 miles per day" with a grain of salt.
I think you need to check it out carefully. It's a custom design, so I doubt that you're going to find much information. (link?
http://www.boats.com/listing/boat_details....se&showMD=false
Have a good surveyor check it over VERY carefully. For all the good things about aluminum, electrolysis is a real and very serious concern. Wiring is usually copper, and any stray copper falling into the bilge is going to eat a hole right through the aluminum. So if they haven't replaced the barrier coat, ask that they not do so until after a survey.
You need to have a knowledgeable surveyor willing to get on his hands and knees to check the hull.
Somebody else should comment on a double-ended hull. Not having sailed on one, I can't judge, but I view them with suspicion. I hope that Jack or another more knowledgable person will also comment.
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