Just a suggestion, as someone who has been looking at various boat designs and trying to gauge average prices, accesorys ect ect... it would be handy if possible on a builders website there was a detailed list of lets say the most requested or standerd hull types with a given price, the potential buyer could then add on whatever he/she wants included in the build. would make the "mind boggling pre-buying research" a hell of a lot easyer. the potential buyer could then contact you for any specifics or for confirming prices and anything els that needs more detail.
So basically giving the person the abillity to work things out for themselvs and saving endless replies to phonecalls, letters and e-mails. Let them work it out and if they are interested they can get in touch.
There is no such thing as a time waster, if someone is about to make one of the biggest purchases of thier lives of course they are going to ask loads of questions and shop around before they commit.
just my two cents