you have to consider also that the boat rentals in puerto galera are significantly lower than anilao. In PG a boat can charge as low as P500 for a trip, in anilao it doesn't go lower than P1,000 in fact it can go as high as P1,700 for the maricaban dive sites. If I were a resort owner, I get a lone diver on a tuesday and he wants to do two dives to Bahura and Beatrice with a dive guide. The cost would be
Boat - P1,700
Tanks - P260 (P130 each)
Dive Guide - P1,200
Total - P3,160
If I charge a fix rate of lets say P1,200 per dive, I only get P2,400 from the diver for two dives. I'm short by P700. To make it viable I have to have my own boat so I don't need to hire a boat for P1,700. If I have my own boat that would mean lost income for the local boatman. You probably know what the locals will do alternatively to put food on the table.
And honestly I'm not sure if majority of the manila based divers are willing to pay P1,200 per dive.