Lol did not see that. And glad you liked the helicopter
One of the coolest things I've ever done. I've done it twice now and I'm due for another.
My usual 10 day trip is something like this:
Flights: $380-600 depending on time of year / deals, etc. Almost always it's between $450-$550 direct or 1 stop. January 2016 I paid $380 direct to Maui which is the cheapest I've found.
Car: $13-20/day depending on what deal I can find on a Ford Focus size or similar.
Accommodation: $150-250/nt for a condo, split between 2-4 people
Meals: Costco / WalMart for essentials and eat breakfast at home. Lunch is usually cheap and dinner is usually $100-150 CAD per meal total per day (divided by 2 usually).
Activities: Usually minimal to none, since most things in Hawaii are free that I like to do (i.e. Hike, snorkel, etc.)
Rough per-person cost for us is usually around $2-2.5K depending on activities, extra meals, etc. A good all inclusive is at usually at least $2-2.5k+ for 6 days so I've always felt like Hawaii was pretty good value overall. You can spend 10 times that no problem in Hawaii if you want to though, no doubt.
$2K for 5 days is a lot in my opinion, but a good chunk of that is a sunk cost regardless of how long you stay (like airfare).
If you go at high season it's the accommodation that is the killer (just like everywhere else), but I have never been there over Christmas or New Years. The worst exchange rate I have experienced there was January 2016 when the dollar was around 1.46, and of course it was on Maui which is already by far the most expensive island haha.