You mentioned
owning your part in the dysfunctional relationship, that you ended up enabling him. It is good to do that, with yourself, with your counselor, with your lawyer. With those you trust. But beware that sharing too much information with your stbEx, his lawyer or others could become self-sabotaging if used against you. What I'm saying is that if you state in legal scenarios that you bear responsibility to some extent, it might be used against you. Maybe not, but do be cautious.
As for keeping the family home, can you afford to pay the mortgage and associated bills? If not then your natural emotions could be influencing your decision making too much. Accept that post-marriage life may have greater financial limitations. Frankly, it's okay to move to a more affordable home if that becomes necessary. The kids won't mind too much, after all,
your home is where you live not necessarily a particular building.

If your stbEx is the main earner for the family, then likely the court would have him contribute to the family's expenses during and (for a limited time) after the divorce. Also, some amount of child support is almost a certainty. Is he opposing you having majority parenting? One goal to establish from the very first, such as in the temp order, is that you the stable parent have primary decision making and majority parenting in the schedule. How is that going?
I like vacations in the mountains in western CO, I hope to wander there in the next few weeks, hiking, seeing the sights and parking along peaceful streams and rivers.