Don't beat yourself up for too long. Thousands and thousands of people have had the same deal handed to them through the years. We lost over $40K on a bad business deal, kept getting $$ from the equity of our house to stay alive..by the time it was over, we cleared a whopping $7000. Ouch. I was like you, that money that we 'should' have had would have gone a long way, but...
The fact that he has a job is a big plus! So many people don't... And you'll have a new life, new challenges, new victories there at your new place.
I'm happier now than I was then. Still tap dancing nervously over the thought of taxes coming due, but in the long run - I have everything I need: shelter, heat, lots of food, people who care about me and gardening season is just around the corner! I'm blessed with lots of hard work.
Hang in there!