Hi, 25yrs, I am sorry to see you so conflicted over this. Moving to Alaska wouldn't be an easy thing, but what is? Maybe you two could still end up where you always wanted to be, but in the future, not just now. Are there things you could do to make it less bleak up there for your family? Take a little California with you? Find out all you can about SAD, and how to prevent it. Alot of it may be having D17 leaving the nest, but understandable that you too would be leaving the nest you have made, and all the friends and life you have there, but weighed against what you would be gaining, which is better for you and your family?
I remember a novel written in the sixties or seventies, I read it when I was about 14, about a couple who got married, and he took her far away from her friends and family, and she had a hard time adjusting. I can't remember the name of it, but I though it was Alaska he took her to, I could be wrong.
I believe you will make the right decision after you agonize over it for awhile.
And about the possibility of opening a theatre up there; I think it's a great idea, they are probably hungry for that sort of thing, something else to occupy their minds on those dark nights, and days. It does sound a tad distrustful to ask for the postnup, but if worded right, maybe H won't get offended.