I have been considering a Garage in my yard. I am interested in the 12x16 plans that are supposedly in the book "Timber Frame construction." I was considering buying that book. I picked it because of the plans. I was going to double the length to fit a truck in there. Here are my questions:

1) Is this a good book?
2) Can I make a 12x32 garage simply by adding two bents in this plan?
3) Does this have a loft with at least 4' walls on the outside?
4) Can anyone venture a guess as to the frame cost for this? I'll have it cut at a local sawmill.
5) Is cottonwood good for the frame? I was at least going to use it for the sheathing and roof underlayment.
6) Can I build it without a concrete floor?

thanks a lot - I really appreciate it!

Mike