Be sure to find a good reputation. It's okay to spend more money. You'll never find those charlatans. This is why many people say they are superstitious, because the people they are looking for know nothing about the Yijing Bagua geomantic Taoism. In fact, these are not superstitions, but the cultural treasures of our Chinese nation, which were cheated by people with half a bottle of water.
For children crying at night, there is a folk method, which is to write "Yellow Emperor, Yellow Emperor, there is a crying yelang in my family, and the gentleman who walks three times will sleep until dawn" on red paper and stick it on the toilet or telephone pole.
I saw it posted by the neighborhood when I was a child. It is said to be quite useful. You can try. I just read a book called Daoism at home, which is also written in this way.
I don't know if you have seen The Great Eunuch, which was written by Li's master to the crying child.