The nature of the lawyer you hire, your location, and other factors also affect your costs. On the other hand, if you want an agreement that contains provisions related to marital maintenance, child custody and maintenance, health care, estate planning and succession, you will need a more complex agreement as well as additional documents and tools. In this situation, the cost may exceed several thousand dollars or more, especially if you include a comprehensive succession plan. Of course, moving in also increases a lot of pressure on a relationship. Living together means that people start asking when you want to get married. You also have to confront any habits with your partner that are simply boring while you live apart, but suddenly become unbearable when you are constantly next to your treasure. .