OP here, and honestly the emotional side floored me more than any visa form too. What helped: photographing the things I couldn't keep. I let go of the object but kept the memory, and that made parting with forty years of stuff bearable.
Forty years in one house and now we're trying to fit a life into a shipping crate. Every object has a memory and the kids don't want the 'good china'. The emotional side of downsizing has been harder than any visa form. How did you decide what to ship, sell, gift, or let go of without regret?