There's a thread called something like [sorry] "Surveying 101" here in CF. A CF Google
Custom Search should find it for you. It, too, is about how to survey
your own boat. It certainly could lead to productive questions of the "proper" surveyor
Surveyors are like other professions in that some individuals do a lot better job than others. Wherever you buy, ask around to find out who is best in that area....
Good luck with it. Maybe you can find a sloop-rigged one.