It would probably cost just as much as whatever you're subscribed to.
But depending on where you live, you may be relegated to local productions of Oklahoma, Death of a Salesman, Hello Dolly... Might have an occasional production of Romeo and Juliet. Comedy could be on the lower end. You might get the guy, that opened for the guy who opened for Louis C.K.
I guess it depends on how far you're willing to travel for quality performance, and how that compares to how much you're paying for Cable/Streaming.