If youre staying in Kalayaan, you only need around 10mins to get to McKinley via cab. If youre riding the jeep that passes by McKinley going to Nichols, give yourself another 10mins, or maybe 30mins from Kalayaan. Coz McKinley might look small, but the walk from the entrance, especially if you're going somewhere near Accenture, can take you around another 10mins to walk to. And it's not really that easy to grab a cab sa Kalayaan in the morning...you would have to walk towards the JP Morgan bldg area to get one.
Or yeah, just take the MRT (if you dare) to makati, you can also ride that habal-habal thing from ayala MRT to Mckinley Hill.