If I knew that I would have packed my bags already instead of making this board :'^(
Sometimes you can be a passenger on a cargo ship, which is incredibly cheap, but incredibly slow, and there's not much to do in the ship. Sometimes you even need to help with chores.
I heard the food is great on cargo ships though, they usually got a Chinese cook.
You can always try to make friends with a Hawaiian on the internet and ask if you can couch surf there, that would be the cheapest option lodging-wise.
There's also couch surfing websites like:
https://www.couchsurfing.com/Cheapest hotels I can find are around 700 dollars for 7 days.
Most all-inclusive travels from my country seem to be around 3000 dollars.
That's all way too much money for me right now.
So no pineapples for me :'^(
I wish I could've helped you more with that, Mahu!