Hi Kelly, following your thread and you're getting great advice and insight.
I see some small similarities that I wanted to comment on.
I'm filing for divorce so he knows there are consequences. And I kind of do hope he tries to date and find someone else because that will be a reality check on its own. That he has a lot of baggage and I was willing to tolerate and love him...baggage included. A lot of women won't.
I agree with what Marvin said that filing for divorce should be for you, to protect your family's financial well being, but not to show him consequences, because honestly he probably can't grasp the concept of consequences.
On the subject of his baggage and finding someone else, this may surprise you, but this thought may have already crossed his mind - I was really extremely puzzled by the fact that for at least a year before BD, my former H kept saying how lucky he was that I "put up with him." Not saying it to me - sweeping statements on social media about his amazing wife who "puts up with me." The last birthday card he gave me literally said, "I love that thing you do, you know the one...keep doing it" and then on the inside it said, "Putting up with me."
I now see that not only was it true that he saw me as his "rock" who "put up with him," that was an unhealthy and unsustainable dynamic. As Marvin said, in a healthy relationship there's interdependency, not just one sturdy rock.
I believe my former H was actually keenly aware of what a difficult person he was to be in relationship with and was contemplating for some time whether anyone else would cater to him the way I always had (in my mostly subconscious attempt to be the perfect wife/rock so that he would always need me/want me and never leave). He was not looking to grow as a person or do any adulting on his own, he was looking to be "put up with" and taken care of like always, and he indeed found someone to "put up with him." There's broken people everywhere, and people will put up with an awful lot to get a desired benefit, be it a sugar daddy or just a warm body next to them at night.
I don't say this to scare you or discourage you. I just know I recognized a bit of my early post-BD self in your words. And I felt hesitant to post about this, but since you seem to be on good footing so early on, I thought it might be just a helpful word of caution. It's easy to think they're looking through the same lens as us, but they're not. Getting yourself set up for a life with or without him, as you seem to be doing, is the best way forward, because anything can happen - knowing you and your kids are okay no matter what comes is key.