I'll first disclose that I'm not a real estate attorney, nor am I incredibly well-versed with wholesaling in Hawaii beyond "what it is" and the concept behind it. I can only provide you with my current understanding which may or may not be entirely accurate.
My understanding (which could be slightly wrong) is that in Hawaii you need a real estate license to receive "compensation" for the sale/transaction of someone else's house/condo/etc... Moreover, referral fees are illegal if given to an "unlicensed" individual. I'm glossing over some of the more intricate details here, but basically my understanding is that compensation/referral fees need to travel from brokerage (eg. Keller Williams, Century 21, Locations, etc...) to brokerage (eg. Keller Williams, Century 21, Locations, etc...). It doesn't go from agent to brokerage, brokerage to agent, agent to agent, or ESPECIALLY agent to unlicensed person.
So in short, if you wholesale, you're basically selling someone the option to purchase a property below-market price which is still slightly higher than what you made arrangements for with the property owner/seller, then you profit from the amount in the difference in price. Thus you only profit from the sale of the property. Even if you argued that you're selling a contract (the option to purchase) and not a property, that may likely constitute as a referral fee as you're referring the property to another who is likely to purchase.
I'm not saying it's impossible, but there are certainly a lot of hoops to jump through if you want to do this legally. You're better-off getting your RE license and wholesaling/selling the properties yourself.
Again, this is not legal advice, and I recommend you do your own due diligence and speak to the appropriate agencies/individuals for more formal advice if you wish to pursue wholesaling in Hawaii.
Licensed Real Estate Salesperson (RS-81674)