Which is better, wedding photography, advertising design or children's photography?

Advertising design, this cost is lower. It is also easier to enter the business, because ordinary shops only do ordinary design and production, which is relatively simple. I think it is very difficult to do wedding photography, mainly because it requires a lot of investment. If it is a small studio, it is not called wedding photography. It is easier for children's photography to enter the industry than to do high-end photography.