How is the poor travel party poor?

Even if you don't have money, you can travel, take a walk in the supermarket or park near your area, and see what others are doing. Traveling is to go from your accustomed place to the one that others are accustomed to, and treat your own area as a strange place. Theoretically, it is similar to traveling. The city where I live is so big that I can't have been there all by myself. Then invite a few good friends to visit the urban attractions that you have never been to. Isn't it a happy trip? The poor travel party can experience the fun of traveling without spending much money and a few bus fares.