Love your choice of tile. I will say by all means buy all you need initially. My luck would be, I'd never find more when needed.
I ripped the carpet from our bedroom due to foundation problems. I have resisted flooring (living with concrete) as I'd love tile and DH wants laminate flooring. I also want (and this you might consider) radiant heat strips in the floor under the tile. Can be done ~ if I win the lottery ~ I guess.
Good luck with the project.
I also like the looks of the hand scraped flooring. Is it pricey?