2.99% TV is fake, not only on TV, but also on the Internet. Don't believe it.
How much to sell depends on you, whether to sell or not depends on the goods you buy.
If you want to open such a store, first look at your local clothing wholesale market. If you have the resources to support and have a unique vision, you can consider it. Of course, this is only one factor.
Such shops are suitable in places where rents are cheaper and crowds are more suitable, such as villages in cities.