I normally stage the show I want to make for real. I mean everything. I need a girl dancing or moving- I just ask a friend to do it against white or black background (depends on clothes colors) or do it myself. Then record it on video and then manually trace over parts I want. It takes time but it's much cheaper then buying frames.
I can draw but never study kinematics. So I have no clue how objects move.
I have few weddings coming so I'm working on wedding show right now.
I hired an Italian guy to do my wires. Now they look like spaghetti!