Home warranties can sometimes cover rental properties, but it really depends on the specific terms of the warranty and the provider.

Did you have any specific area in mind? 

I'm hesitant to set a utility cap, as I worry that disclosing a specific amount (like $500) could deter potential tenants.

Some insurance companies offer policies specifically designed for owner-occupied multifamily properties, so it’s worth asking about that option.The key is ensuring both your personal residence and the rental unit are adequately covered.

If you are going to be doing the rehab work in exchange for equity then that value needs to be determined up front with a specific timeline that you have to adhere to in order to earn your equity.

Building department can advise on specific next steps - municpal hearing and presentation of plans will be required in most cases. 

Stats can be foundhttps://www.ramaui.com/housing-statisticsOr for all islands herehttps://www.hawaiirealtors.com/resources/housing-trends-2/Your realtor can produce more specific stats on your area of interest.

Specific technical issue that triggered this post.

Are you actively looking at specific properties there, or just exploring the market for now?

.)- Crime stats... if you know specific zip codes/submarkets that you'd like to target, the best data will come from local precincts. - and more..I'd recommend remaining active not only here on BiggerPockets, but in other valuable RE investment networks that you can find - i.e. local meetups (meetup.com, eventbrite, BP local events).