1992 went through something similar. Wasn't the shop that burned but rather
the house. only thing I had left was the clothes on my back, Oh! Dam, I was
wearing a company uniform! had a pair a skivvies, pair of socks, and a pair
of shoes.
I understand what you are going through.
Don't forget to keep an accurate account of everything lost and the value.
What insurance don't pay, you can deduct from your income taxes as a loss. I
went through the ashes and inventoried every thing there, had an auctioneer
give me a swayed (but not so much though) market value of every thing there.
I thought I was well insured. I was a college student at the time and had
bought a small place so as to not pay rent, i.e. someone else's mortgage. I
didn't realize just how much I had or what the replacement cost was or what
the market value was. After insurance paid out, I still had a $30 K loss
that I was able to deduct! Made a big difference in my taxes, especially
since I got married later that year.

I hope everything works out and best of luck to ya
Mike