I just want to confirm what a good and thoughtful mom you are. You are obviously putting your kids’ futures first and foremost in your decision making.
Is there a possibility of changing departments/positions that would be more flexible? Maybe another higher paying job would allow you to throw $1000 a month into a 529 plan and accomplish similar results.
Cheers to you for putting your kids first but you need to be healthy and happy so they can they can follow your lead.