No need to be able to afford real expensive mountainside resorts like the Eden one in Davao. You just have to be willing to be adventurous and rough it up a little bit. Go mountain climbing with your family and bond under the stars in the cool night air. You don't even have to join open climbs, you can do it on your own. Of course, I am recommending minor climbs like Daguldul or Gulugod Baboy or Batulao (where the views are breathtaking and only about two hours of slow ascent).
The Metropolitan Mountaineering Society is a great resource for itineraries. You won't need Black Diamond Z-Poles for minor climbs but you still have to prepare and have the right gear (sturdy backpack) and shoes. You should also do your research about the area and mind advisories and local customs in deference to people living there.
Good luck. The beaches will be teeming with people so head to the mountains instead for the rest and relaxation you need.