Hi
I may be going about the same time.
If you are interested, you might also look at diving the wrecks at Subic Bay and Coron.
Johan’s Beach and Dive Resort at Subic Bay - http://subicdive.com/
Johan de Sadeleir (Owner) - johan@subicdive.com
Busuanga Sea Dive Resort at Coron - http://www.seadiveresort.com/
Patrick Preston (Dive shop manager) - dive-the-planet@hotmail.com
Prices will be similar to your suggested $100 per day or less for diving, room and meals.
Ed