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!