You can almost always swap out one species for another. The question is, what is involved?
Sections become larger, or smaller, joinery may well change, and, aesthtic issues abound.
The House you are referring to was designed to meet a particular client's needs, as well as those of the builder / architect, obviously some consideration was given to make it suitable to be the centerpiece of the book.
As someone stated above, Jack is a versitle builder. He does not stick to any one species, any one Sizing. I would bear that in mind when looking to adapt his plan to your own needs; use it as a starting place, not neccesarily a destination.
If you were to hire Jack, it is extremely unlikely that you would end up with a House which would be identical to the one you are viewing, even should many of your needs overlap with those for whom the House in the book was designed.
If you, yourself, are unable, or uncomfortable, resizing and adapting the plans to your own needs,then, by all means, Do not hesitate for a moment to hire someone capable of doing so.
