Crane Needed Friday

[jkjnp]

I know this is a long shot, but I'm looking for a crane to lift a heat pump about 50ft onto the roof of my condo building (it's a converted mill) on Friday morning. Location is in North Providence, RI.
Anyone know of any companies who could do the job? The company that is signed up now has a minimum of a half-day and will charge $600 for a 30 minute job.
The heat pump is not particularly heavy, there is just no way to get it onto the roof without a crane.

Thanks!

Jonas