The new edition of "Sample Costs to Establish and Produce Fresh Market Blackberries Study" is now available from UCCE. 

http://coststudies.ucdavis.edu/files//2013/09/30/blackberrycc2013.pdf

This is another great cost and return study in berries authored by Laura Tourte, Rich De Moura, Karen Klonsky, and yours truly.   

We certainly weren't in alone in writing this study, and this work could not have been accomplished without the substantial input and contributions from local blackberry growers - thank you all!