Katawa ko dah.  Gabii wala pa man to ang questions  
 
Akoang suggestions are always ingon ani. 
1)  reservation fee
----- Most hotels kay mangayo man daan og payment for that stay period.  So ig-book, pabayari daan ang ila gi-book nga periods.  Or, if medyo longer ang stay, at least 50% downpayment siguro is reasonable na, balance to be paid upon check-in.
2)  get more customers
----- Akong usual suggestion is :  pakig-
tie-up with travels & tour agencies and hotels
----- Provide free shuttle service from one point to your place
----- Invite diving instructors and 
offer diving lessons pod.
----- Do a "rewards program", (ex: 50% off to iStoryans 

 "the best" ,  or 30% on second visit within 5 months time, etc)
Syempre, all costs are considered aron dili ta lugi.
Mao ra na ako ikatampo Bro.
Good luck Boss!