You can check with a realty broker to find out the rent for a store in the mall. As to where to get the suppliers, there are a lot whole sale importers. If you sale in large quatity, you can import yourself, for small amount, you can try wholesale in New York or other major cities. Check on line, you will find some suppliers. After checking the rent, and supplies, you will have some idea about the expense. Then, check with some stores in the mall to see their annual gross revenue, then, you will know what you should do.
Runan Zhang
attorney at law
runanzhang.com