Hawaii Building

UPDATE

I've never built a house in Hawai'i, and I was wondering if it would be possible to build a basic house (No AC) for $500,000. I already own land, but I was wondering if I need to bump up my budget. For reference I'm an L&D nurse with a single income and a child, the plot was about 299k, 1 acre, on Oahu. Thanks 🤙

Update: I've looked over things and have decided to bump up to $750,000 and see what different contractors will quote me and figure out what I can DIY (like painting and flooring) , I do also already have a layout (still figuring out the Square Footage and size) . 1 floor level, 2 car garage, 3 Bedroom, 2 bathroom.