I am planning my 1st trip to Oahu. We are staying at the Royal Grove and it seems there is a company called Hawaiian Ocean that rents unbrellas and the sort. Looks like it is located near the area of beach where we will spend most of our time (btwn Duke Kamehameha statue and police station). Do any of the locals or long-time visitors know about how much it costs to rent this equipment? Budget is an issue and I want to plan if it is going to cost an arm and leg. Thanks.