You don't need to stop buying games (you should if it creates a problem to your finances but if not you shouldn't) you just have to stop care about trophies and platinums. If you do that, you are going to cut probably a 70% of the time you mentioned. I have 1170 games across all ps platforms almost all bought on sales. Don't care about platinums, i finish lots of them per month without going for the plat (except if its very very easy or i really like the game) and im very happy with this situation cause ill have games to play till i get old even if i stop buying games forever. It's just a matter of perspective. You need to save money? Stop buying. You don't need to save? Buy as many as you like.