You could do it! There was almost no cutting at all. 8 foot lengths are standard, so once the structure was laid out to be square, it was just a matter of screwing the boards in place. It was the kind of project that was fun - not fussy, not perfect, but functional.
My brother once told me, and he was right - "Always use screws. That way it's easy to un-do."
Yes, when Stubby came home injured - the person released him, I didn't find him -- it was one of the worst moments of my life. All of a sudden their paradise turned life-threatening. It was awful.