Timothy, a year is a good estimate, and you will enjoy the build, especially if you take your time. My friend posted my build thread earlier in this thread - it was my first jet, and was built for a customer.
It is currently in the paint shop, and hopefully will be at some of this years shows around the globe with the owner. As soon as is back for the final fit out I will post pictures of the final painted result.
Room is tight in the fuselage, and keeping the weight up front is important, so really carefull planning will benefit you in the long term.
Good luck and will keep an eye on the progress
marcs