FG, I am new here, so I am hesitatnt to offer much advice. I will say (and I have not read your thread), that unless there is hostility shown to the kids, it may be better to stay in the same house. Again, do not know your sitch, and there may be a alid reason for not staying in the same house. I know (personally from what I am doing) it will be harder on you to stay in the same house, but right now, it isn't about you or your feelings, no matter how justifiable they are. Don't say that to be mean, just saying what I think DB'ing would say, being someone in that sitch right now.
I will also tell you I grea up in a household where there was constant argument by my parents - I cannot remember many nights I did not go to sleep to the sound of them arguing loudly at each other. They eventually divorced, and it was way too long befoer they did. I think that had an impact on me and probably the way I have behaved in some respects in my M. I am delaing with, and changing, those behaviors.
Only you know if it is time for S. Jut tread cautiously.