This is absolutely the very best of AirBnB.
It's better in basically every way than a hotel, and certainly cheaper if you fill the house - and it has at least four double bedrooms, not including lounge. It has an amazing kitchen, lots of lounge areas, amazing view but is also secluded, and is 5 mins drive from the best beaches in Kauai. It will be a few mins walk from the best hotel in the whole of Hawai'i when that opens (1Hotel Hanalei), so will only get better.
It has all sorts of equipment - surf, snorkel etc - and even a piano and other music instruments!
Not cheap for personal getaway, but even then, just ideal.
If in doubt, get this property. You will not regret it. Thanks to owner and leasing company that helps manage it.