RM 30k is just nice for a good system.

Let's see the breakdown for a nice system.

Receiver - RM 5k
3 or 5 channels Power Amp - RM 3-5k
Powerful Subwoofer - RM 7k to 10k.
Good set of 5 speakers - RM 15k.
Cables - RM 2k - 3k.
BD player or NMT - RM 1k.

If you can do room treatment in your living room, add another 1.5k for DIY. Commercial bass trap and sound absorber like Auralex are more expensive. Min need to spend RM5k and above.