Thanks again @J Scott for answering my question last week via email. Your new podcast rocked, and was so full of info, that I listened to it twice. I'll post the question that I had asked you here in this thread, so maybe it can help others with a similar question:
Shawn: In the podcast, you mentioned that rehab costs for northern CA, LA, Boston are "whole worlds by themselves." Does this mean that the numbers won't really mesh with the Los Angeles market?
J: Are you talking about the estimating rehab book? Assuming so, that's correct, the price ranges I list in the book will not mesh with what you could expect to see in Southern California.
That said, the book is more about providing a methodology for figuring out your rehab costs than it is for giving you the number. It lays out a system and process for creating a scope of work that can then be used to get bit to figure out actual renovation costs.
Even if the price ranges aren't going to be accurate for you, if you are looking for a process estimating, I think you'll find the book very valuable.