It turns out the “professional-level” FM transmitters are pretty gosh darn expensive. I’m not sure why exactly, since you can pick up any old small transmitter from Target for $10. But a big-boy, capable of shooting out a distance of about 150 feet, sets you back $150. Anyway, I’ve decided to get one, but I’m not just waiting for it to arrive.
Best-guess first showing: Next Friday or Saturday (weekend of the 7th).