As for telling the children, I am a firm believer that it is very important to inform them because it can be very easy to get confused as a child as many up and downs, back and forth happen between adults in this moment. Children deserve to know the truth of the matter because it is also their life that is changing entirely but also taking into consideration their age and mantal capacity.A healthy relationship with your ex can help the children process their emotions of all the unknowns of the changes to come. Open communication on changes that are happening can help them easily navigate through daily concerns, emotions and any fears they may be facing. Always showing a united front is key in communicating things about the matter to children, this way both parents know what is being said. Also, allow children to be honest with how they feel at any moment. As a parent one must be minful at the fact that the children have lost their home as they knew and a parent in their daily lives. Children will always need both parents in their lives and keeping them as priorty is first and for most.