Where do you get the electricity to run a decent sound system. Do you have your own CAT450 genset? Last time I was living in Taguig, Metro Manila, power was unreliable and current delivery was almost nonexistent. Not to mention the spikes and micro interruptions several times a day. And how are you going to deal with neighbors' noise complaints? Unless you live on a hill in Cebu, neighbors are packed in pretty darned close in Manila. I know I could never do what I do, if I had neighbors within 1/2 mile of me. Having my system in Manila would be unthinkable, even if I could find suitable 200A service for the amp rack.
BTW, very nice looking space you've got there. Did you put in adequate rebar in the concrete? Frequent and sometimes strong earthquakes necessitate special construction techniques!