Well, maybe I shouldn't be responding, since I'm not going to talk about moving with your family.
My comments have to do with your dreams. I dreamed of living in the UK when I was a teenager (my mom is English), but didn't do it - visited a few times through the years and always wondered 'what if'.
When my first marriage ended over five years ago (me in my late 40's, kids mostly grown), I started to picture myself as an elderly woman in my rocking chair, still wondering 'what if'.
I have family ties, but even without them, I can honestly say I'm happy I took the jump. I came over on a student visa, but married two years later. Unfortunately, the marriage is falling apart, but even with all that to go through, I am SO happy I fulfilled my dream of living here, and don't intend to move back to the US - I miss my kids, but the opportunity to see them once a year or so will have to do.
Best of luck on your move!