Thank you all for the comments.
I didn't mean to imply we aren't intending to migrate. Our original timeline was to migrate this year. The ir-1 will expire in December. A change at work has delayed that plan. I'd like to leave the employer under good circumstances as they've been good to me and leaving will cause them some hardship. Our new plan is to migrate mid-next year. We do have a US address, I have renewed my drivers license recently, and my American bank account has the bulk of our funds.
If I understand it rightly, we will all (I and our 3 kids) need to be present at her first entry. Was just hoping to avoid the large expense if possible, but it is what it is.