As for what to charge for Pay-Per-View.

I think a target total $ gross would be what the promoter would charge a title sponsor for the evening. For example $4000 cost to sponsor a local show.

Divide that $4000 by the number of projected viewers to get your cost to view.

In this case an estimated 500 buyers would be $8 cost to view.(It will take promotion to reach that number )

How many have viewed the free (Unannounced) live shows so far ?
I think USAC knows that figure.