Can o' worms, definitely! ;D
As for VP as openSource ... if you were to use all original tables, it might be possible to charge a quarter for the use of the designs, in a bar setting ... but VP is best with recreations (unless you have super killer originals). Recreations would not work without proper licensing of the Bally, Williams, etc tables.
I dunno ... just some initial thoughts ... a loaded subject ...
But if there were a cab in a bar with original tables ... would it really be enough to merit going to that kind of trouble? Would it really be something people would play?
Just offhand thoughts ....