Thank you all for the great suggestions...The engineer from the manufacture website will be getting in touch with a 2x 4 installation that cab be done with a large metal plate placed between the 2 ceiling joists. The method is listed in there book on installations and seems like a possible option...the protable kit is also an option. If you ever get a question again like this You can redirec them to southpawenterprises.com and check out:
Portable Itinerant Frame

And yes I am interested in the unistrut...Is that an option or do you need steel bea construction???? I can't beleive how many views this thread has gotten