How much money should I bring?

Hello! I will be traveling to HK and Macau for the first time (its my first time to go abroad actually so im actually scared of being denied)

I will be visiting there with my Japanese friend. Do you think this can affect me? Maybe the immigration might think its bad? Hotels are booked by my friend and its in Japanese..

How much money should I bring? Is 30K Php enough? I will go there Sep 9 to 13.

Please enlighten me.