It's a long flight, but it's not an unreasonably expensive flight. Especially if you live in a place with winter, it might be nice to visit in novemberish and marchish to get a warm week in between your cold at home. There's lots of people who live near me and visit Hawaii once a year.

Personally, I'd be more likely to do a two week stay than two one week stays, I'd rather reduce my time on an airplane. But leaving for two weeks is harder than leaving for one for all sorts of reasons.