This question is really difficult to answer, because no one can guarantee that you will make money in business. But it can give you some ideas. First of all, optical shops do not need to be in very prosperous locations, because the most important thing for optical shops is repeat customers. In other words, customers are slowly raised by relying on the reputation of the store, their own technical means, and their own marketing methods. The rent in a prosperous area is relatively high, so it is not suitable for a new optical shop, because it is more difficult to survive. Unless you have relatively strong funds, that is another matter.