I suggest you subscribe to PS+. 1 year only RM129. During promotion you can get extra 3 month.

PS+ member can get free games every month. Sometime Sony gave AAA titles for PS+ member. As long your PS+ not expired, you can still play PS+ games.

Another advantage for PS+ member is you can buy digital games at huge discount. Every month Sony always have discount sale.

To save money, don't buy new released games. Instead buy old games if you're not yet played. There a tone of games worth to play depend on your liking.

Buying second hand is another option so that you can get cheaper price instead of paying full price. You also can sell back later after finish playing.