I initially skipped reading your trip report because it was very long. Just finally found time to read it just now and enjoyed it.
I too thought Hawaii will be a one time, been there, done that type of trip when my family first went in 2015. When we got back, I wanted to return back so badly, that I started looking at more affordable ways to stay in Hawaii. Since that time, I learned about timeshares, bought a few (HGVC, WorldMark, RCI trader, Vistana, and Aulani

). Okay, more than a few timeshares, but we now go to Hawaii every year since than (except during the 2020 COVID lockdowns, where we had to cancel our trip and reschedule for 2021).
We are having our first ever Family Reunion where everyone will be present in the Big Island next month. Usually somebody miss for one reason or another, but somehow everyone is committed to making it to Hawaii. LOL!!! Thankfully the timeshares allows me to bring my entire extended family (my parents, my 3 siblings and their spouses and kids) staying in 3 units for two weeks, so it will be nice to finally just relax together as a family, especially given our dad's current health situation.
Here's to hoping you don't catch the timeshare bug like me and go on purchasing more now that you returned from Oahu

!!!
Great3