MyOahuPlaces.com is now OahuOahu.com  Same site easier name. 
This site has Oahu’s top attractions shared on google maps so you can easily save them, and times, prices, and quite a few insider tips.   Ive vacationed in Oahu over 30 times in 15 years so Ive learned alot over the years. This site will help you NOT make some of the mistakes I have. You can also download all the places mentioned on the site here, like a Vacation Checklist. 
The cost:  I use AirBnB to rent a top rated condo or apartment within walking distance of the Beach for as low as $59 a night. Click here to Save $35 on AirBnB, and then view my favorite places in Waikiki. You can also get a car rental from $25 a day from Turo.com. I have found Kiwi.com is the best place to find flight deals. As of 9/13/2020 PHX to HNL is $477 Round Trip from Phoenix.
If you have any questions, please feel free to contact me at Michael@JageMail.com