Decided I'd dare to look stupid (yet again).
I can't tell if it would work this way Howard, and I wouldn't want to back up if I were you, but if it were me I'd be putting it up in pieces, starting one beam at a time, instead of trying to lift four beams plus some purlins.
One fact I'm sure of, after buying a new king-size mattress last week - don't try to get it up there with a front end loader.