Bad idea, sleeping in your car is illegal on all public property in Hawaii and police *do* enforce that law. If you want to sleep in a car or camper you'll also need to find a campsite or parking space to rent.
People Also Ask
“Generally, experts suggest that a comfortable living in Hawaii would require an annual income of at least $80,000 to $100,000 for a single person and around $125,000 to $150,000 for a family.”
Can I move to Hawaii without a job? Yes, you can. Many newcomers do just that. Even so, you will have to find a job as soon as possible due to the high living expenses.