I'd say it would be less cathartic and more masochistic. Stop beating yourself up. This is not your fault. Take the easy options, ask for help if you need. You're dealing with enormous emotional, physical & financial upheaval as it is. It's ok to do the bare minimum and not be able to cope with everything. You dont need to flog yourself whilst doing it.

Getting on that plane is going to be cathartic. Raising 2 girls on your own will be empowering enough. Let go the superfluous and focus on what matters most.