Holy smokes, where do we begin? Each of these topics is worthy of a book. How about picking them off one at a time?
Growth - not much in volume, but significantely in prestige and quality.
Cost - labor of TF labor compared to stick labor is biggest cost difference, then other fun stuff. Cost mostly dependent upon number of pieces of wood to cut.
Cost spread - huge, lots of options.
Glad to talk off line if you like, I have been working with the TF Business Council on these issues for years. Email direct to arrange phone call.
randychurchill@mac.com