I’m a Maui native and it is not that expensive! You just need to do it the smart way, avoid tourist traps and ABC stores, stop at Costco to stock up on supplies before you reach your hotel. Many of the best things Hawaii has to offer are free: beaches, sunsets, hikes, snorkeling, walking the streets of small beach towns. Condos are also way cheaper than hotels and they are usually beachfront.
We are having trouble deciding on another island to go to besides Santorini (we both want to go there). I was hoping you might be able to make a suggestion. We are not really into late night partying/night life. We LOVE good food..quite possibly the most important item on our list. We also like to hike, my husband is very into history, we love beer/wine, we could definitely be into in a less populated/touristy type spot. Gorgeous beaches and great views are also a plus.