This isn't exactly what you are looking for, but an alternative:
My area Menards has a self service computer that you can design barns to a certain extent. It then prints off the design, materials list, and price quote to have everything delivered.
My local Carter Lumber store offers a more detailed program with many more options, and they give you the plan, small prints, materials list and prices too. But at Carter they have to work the computer so you need to schedule some time with them.
I came across these while designing mine. Both of these were very helpful to not only get a feel for the design look, but a price too. I'm sure there are similar options at other lumber stores.
Good luck