sure life is complicated but your happiness matters, people get so caught up in the whole "life is complicated, i will be broke, i have no where to go"
truth is youre just comfortable and you dont have the balls to get the fuck out.
Just do it. A friend or relative will almost always allow you to stay with them till you get back on your feet, your children will understand when its the proper time, I would 150% rather my parents happy and apart than together with massive tension and fighting, everyone says "stay together for the kids" no.its stay together because youre comfortable and afraid Children are resilient and they wouldnt want parents fighting and arguing and negative emotions and feelings around them 24/7