Well, he's certainly not the first or last " in recovery" person to become sort of manic-obsessed with enlightening other people. Sure beats maintaining a focus on overcoming his own character defects.
That he never considered child care while the two of you attended a seminar says it all and it seems to remain " all about him".
That he's using God to manipulate you is just sad.
On a practical front, putting family first, he could have taken a modest apartment and a PT job and began the process of rebuilding financial security for his family.
I admire your intentions to protect yourself and children from his latest obsession.