Hey, welcome to Hawaii, ok? You know to park car in Waikiki really a problem, ok? First, consider whether you wanna use car every day, of if it gonna sit inna parking spot some day, maybe only rent for c1, maybe 2 day, when you actually gonna wanna use it, ok? Trump for sure got they own parking, but for sure it spensive, now otha hotel inna area also same way, so not gonna park you car for you for less money, ok? Now I know of one guy who park his car ova Ala Moana, then take taxi ova to hotel, but my opinion, that ask for trouble, cause even tho it free, shopping center will for sure tow you car if they think you do this, and cost of taxi gonna be bout same as parking fee, and for sure leave you car unlock cause it gonna get break in, sorry to say but some local people not squeamish bout break into rental car, and for sure it easy to know that car a rental, ok? Of course they some public parking ova Ala Wai Canal, long the street, but that kina far way from Trump, ok? Best choice? Just pay the park fee, and enjoy vacation, ok? Hope this help, peace and aloha to you!