IMO, This is a great way to hang JUST the frames, it will work even if the joists aren't running in the direction that is best for hanging the frames......ie. on center of the joists. You can simply add drop blocks where they work best for you and you are not locked into the exiting framing.
The lengths of the blocks are determined by the space needed to insert the fork/s so they clear the ceiling and the 2x. You might also be able to find hooks at the desired drop and use them with galvanized pipe.
My question is where will you put all of the wheels, bars and other stuff as they will take up a lot of space and are awkward because of the skewers.....I use a pipe resting/hung on hooks but it is still problematic.
Best, Ben