I had a conversation with Mike (from Zhik - a company that manufacturers some of the greatest specialty sailing gear I’ve ever worn) this past weekend and he pointed me to a blog on the USACA site (US A-Catamaran Association).  Tony Arends, aka “Racer-X” is home building an a-cat of his own design and is chronicaling the process.  It’s pretty neat stuff and after catching up and watching the details of his build so far, I think this is doable!  Check it out.