A-Class building help?

Hey everyone.
I'm interested in building a small catamaran that can be single-handed by a pretty small person (130lbs). I'd like to build out of ply, similar to the original Tornado. I have pretty minimal boatbuilding experience, a bit of woodworking experience, and plenty (I think) of sailing experience.

From a bit of searching around, I'm thinking an A-Class looks like a good choice, especially because there's an active fleet nearby. However, I have no idea...

a) which design I should use.
b) where to get plans.
c) how much it might cost
d) how much time it would take

In other words, how would you get started on a project like this?

And yes, I have seen this http://www.thebeachcats.com/news/49/build-your-own-a-class-catamaran/

Thanks in advance.

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Jack
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