Now for the hard part.
Mounting on the ceiling
As long as you have some sort of metal saw (sabre saw, sawzall) to cut unistrut, all-thread, and steel plate to length it's pretty easy.
Affix unistrut to ceiling joists with lag screws (3/8" work, be sure to pre-drill), attach metal to the projector, and connect the two in a convenient way using all-thread with thin lock nuts above the channel nuts so there's no way to accidentally unscrew it.
You can even use longer pieces reaching the floor, lift a corner a few inches at a time, and get it up there without help.