Forget pricing model for now. They are big companies so you can basically charge whatever you want if there is a need.

Focus on figuring out if there is a pain.

I remember reading that some company had built this on springwise or sprouter weekly. But it was a hardware device which had to be installed in the theater so you could beat them by price.

Bottom line: Write up a proposal (4 slides of how this will be used) and then hammer linkedin to get an interview with someone who is slightly executive at a movie theater. Do like 10 interviews. You'll know by then if there is a pain.

Also research that company I mentioned above.