No apologies, mister. This isn't a hijack in the least!
Your family sounds so close that *any* distance is too far. But 1,000 miles is a huge move. I bet your granddaughter isn't going to take the news well, either. My daughters and I lived with or near my parents the first four/five years of their lives. So I know EXACTLY what you mean when you say your wife is like a second mom to your granddaughter. And I'm betting you're like a second dad. Those bonds are intense and amazing. And I could see my (now grown) kids moving away from ME before moving away from my mom.
Dang, Starsky. Another sh!t sandwich!
I'll think of you - and say a prayer for you and your family - tonight. I know you're right: breaking the news won't be easy.
M: 40 H: 44 Married 14 years S11 & D6; D20 & D19 from previous M 2BDs/PAs, 8 years apart Piecing: April 2014