in 2004 my neighbouring commercial unit caught fire and took us out as well, lost everything. At the time it was devastating and created many nightmares, I didn't sleep for a month and we lost in excess of £35000 due under insured.
The positives to come out of it were
1/ we got through it
2/ we moved to brand new premises
3/ the partnership survived and is still very strong
4/ more space (higher rent but worth it)
5/ better lay out
6/ more flexible space and the ability to take on more connected space
looking back we ended up in a better place overall, both in terms of premises and as a business, at the time you don't realise that.
You could be in a worse position.
Thats the positive I'm trying to throw at it.... it could be good for us in the long run, new space, new layout, better operation, room for growth etc.. its just far harder to find new space than i expected.