Insurance broker for over 20 years. I would say it depends on your annual revenues and total value of inventory at any one time. I’d say over 30k in sales revenue and 10k inventory is a good starting point to buy. Obviously you can buy insurance before then but your liability risk is low below that and your total loss wouldn’t even be worth turning in below 10k.

You should be looking at about $500-$600 in insurance cost annual for liability and property coverage with something like 25k in inventory covered. Might be able to get cheaper with RLI’s in home business program if eligible.