Other expenses include the rental fee of the venue, the introduction fee of products and tools, and some equipment expenses, such as display cabinets.
If the venue is not big and you can manage it by yourself, you will lose staff costs.
But if you can't do it yourself, you have to add some manual teacher training fees.
There are some odds and ends.
You can consult two tiger handicraftsmen. Baidu can find them. They have low cost, good service and are very comprehensive. I have attended their teacher class, which is not bad.