Thank you all for the replies.

Unfortunately I only have two choices which is either locally private uni (Kaplan/PSB only) or study overseas. Even SIM-UOL is not in my list.

The cheapest for mid-tier Aus Uni, QUT, would even cost me A$80-90K tentatively for 2 years tuition fees + expenses. So I am not sure if I should just stay put in SG or study overseas so I have a "better chance" to get into Big4 after I grad. Studying overseas really cost a huge sum of amount so I am not sure if it is even worth the ROI.

Is there a huge difference for fresh grads salary between Big 4 and Mid-tier firms?