Sounds like you have enough of a background and experience to handle it. If you can interpret the blu prints, then it sounds like you can do it. Tieing in the roof lines is probably the biggest challenge. I am currently finishing off a 20X20 addition to my parents place that my dad and I have been working on since last year, they are 2hrs away so I can't get up there to help much with the drywall but we hope to be finally done by summer. It sure takes alot longer when you only have a few hours a day to put into it(my dad) and I am only good for a weekend or 2 a month.
