For what it is worth, in many gaming groups the players just buy the player focused stuff. The GM buys the Bestiary, the GM book, and the scenarios. In some particularly well-thought-out groups, it is not unknown for everyone to pony in something for the GM. 5 plays end up pitching in $20 each to the GM - meaning the players are out 0, $20, $50 or however much they can afford.
Given that a computer game costs $50+, often without really knowing how it plays, I wouldn't worry too much.