Armchair, I posted something similar...except I am aiming for a house proper

http://www.tfguild.org/forums/ubbthreads.php?ubb=showthreaded&Number=24954&#Post24954

I have noted that some reclaimed barn specialists make detailed plans of their de-constructed barns for the obvious necessity of rebuilding them. You might be able to make a deal and buy the plans from them, in lieu of buying the reclaimed barn proper. I see these sellers around the net, and sometimes on ebay. Lots in Indiana, Ohio etc where there are barns galore....

cheers
Drew