Potty training is probably one of the most frustrating events for some parents. Why? Because it is the one thing that the child has complete control over - their bowels and bladder. They can hold it, they can sense that you're getting frustrated and manipulate the situation by not going and garnering attention from you, you name it and they'll do it.
Potty training doesn't work best when your child hears that you have a week off of work and 'you' have to teach her how to do it now. Potty training works best when 'she' is ready and takes the lead, while you are there to support her progress.
You mention that she is "fighting you tooth and nail" and she "screams when I tell her it is time to sit on the potty". Those are two big, huge signs that she isn't ready.
It'll go much more smoothly when she initiates the process.
ETA: Trust me, I know how you feel. I'm a teacher and have 10 weeks off with my 2+ year old. He's showing interest in the potty, too. I am due with my second child in December. Secretly I would LOVE, LOVE, LOVE for him to pick up the potty training this summer since he gets complete undivided attention from me. I've been showing him the videos, we've been reading the books, he has potty chairs that he loves to sit on, but the truth is, he isn't ready. As of right now, I'm just letting him "try potty" when he asks and following his lead. It would be the best thing in the world (for me) if he would get the hang of it this summer, but it isn't up to me - it's up to him and if he is ready. I'll certainly keep planting the seeds, but I realize it won't happen until he's ready. Good luck to you!