Is it worth considering to rent a telescoping boom lift for a week? You'd have to have all your trusses all set to go, but if you did, it'd be short work with a Skytrak or similar. Those can usually lift 38' or more, and I've seen them listed to rent for ~$1500/week. It might be money well spent to have get the trusses all set up quickly, and not be distracted by other projects.
Seems like you'd probably spend more than $1500 by the time you go get your crane from 200 miles away, find and install an engine, and fix anything else that's needed.