I assume you read through Eric's log as he was building the first Scaup. Since then, many of us, including myself have built the boat. How the plans came about, I am not exactly sure, I believe the Eric conveinced Sam to re-draw the Black Brant to a larger boat. Sam has since sold probably thousands of sets of plans. If you haven't found Devlin's website, look it up through yahoo.
As far the the price that's pretty close to what it cost to build one. Marine grade plywood isn't cheap, either is good epxoy. But man what a boat. I think I had about $2,000 in the plywood and shipping, $1,000 in epoxy and supplies and between paint, misc supplies and fitting it adds up to about another $1,000.
I built my last year, got the plywood from Edensaw, epoxy from US Compsites and filler etc from RAKA, all were great people to deal with.
Tell us where you live and you might find one of us with one, somewhere close and you could probably take a look.
It doesn't take alot of tools as you read, basicly a few portable power tools and you have a boat shop. Be advised, it is addictive building a boat. You too will be out mixing epoxy at 2:00 AM and then after a little use be dreaming about the next boat.